This is a list of items which are to be taken into account as to make sure you are on the right track when direct-dripping. They are the result of the very many difficulties I have encountered within the natural learning curve to the dripping process and the experience I have gained in return. It may come in handy...
1. Do not drip an have a shorter session than that you have dripped for; meaning: if your drip is good for, say, six puffs, do not put your PV aside after your second drag. If you do so, liquid will drain and result in clogging.
2. Do not drip more than 2 'small' drops at a time. I know this may sound 'controversial' but, unless you are sure the exact amount of drops your atty will take and you can 'feel' that, do not over drip. Two drops will be OK in most cases and you will be good to go for around 4 average puffs. Even though there is a huge number of factors (such as size of drops; consistency of liquid; type and brand of atty; wattage, etc.) in the equation as to determine the amount you can drip, 'two' drops shall never be less than you need (they will at least provide you with a couple of puffs), and better be safe than sorry; avoiding flooding until you are 100 % sure how much your atty will take. Atties are likely to take around 4 'average' drops at a time but after a while, and depending on the intensity of your vaping rythm, that amount will result in 'a lot', so even three drops may be more than enough after the preliminary sessions. The bottom line is: with two drops you will be good to go; always! With more than that you may mess up. Of course that 901 and 510 will take less liquid, for the most part, than a 801, for instance, but then again, not every 801 or BE112 or similar will; the brand and model will not always determine that there is to be consistency in the manufacturing process to the very atty, so, the atomizer's 'personality' will vary from atty to atty. I have noticed that for the most part, in most cases, flooding or the lack of capacity of an atty to keep liquid will be due to how 'runny' or thick the liquid is and because of the placement of the heating element with regards to the center hole. In this latter case, it is possible to fix this but is risky and only possible at first with a debridged unit. And most atties lately have been coming 'displaced'. Ohhhh! And of course: debridged atties will only take one drop.
3. Try to hold your PV in a horizontal position when vaping as to avoid the possibility of draining.
4. Give your atty some minutes to cool both between drags and dripping sessions.
5. Remember that the difference between a dry and a flooded atty is ambiguous, so consider that in general, if you are in doubt it is certainly flooded. If its dry you will know... The thing is that certain signs which may 'sound' like your atty has a 'dry throat' are actually typical of flodding, such as 'rasping' drag; lack of vapor. Whereas, a lot of vapor, and no flavour whatsoever may very well indicate the need for some drops.
6. Last but not least: Remember that the quality of the drags you will get will not always be as those 'dream pulls' you get at the beginning due to minor natural gunking up. I do mention this as a reminder not to over drip in the search for those perfect drags which will only occur if the atty is completly perfectly-primed-broken-in-and-working for a few puffs. At least with most atties, the 'perfection' of puffs shall decrease and become 'average' eventually; after the first drippig sessions. Nevertheless, I would like some experts to confirm this...
So, summarizing, and adding some new golden rules, the drippers' commandments are:
1. Do not leave your drips unnattended;
2. Do not drip more than two ('smallish') drops (one if debridged...) unless you do know your limit;
3. Do not hold your unit in a vertical position when vaping;
4. Do not 'rush' when dripping and vaping;
5. When in doubt, it is not to be dry...
6. Do not aim at that perfect 'first drag' and be content with an average quality one;
7. Do not keep your atty too dry, by re-dripping at first sign of substantial loss of taste/vapor;
8. Give your atty a regular blow job; it will appreciate it!
9. Do not drip and drive.
10. Do never use cartos or carts! The Dripping Gods shall go mad..... Trust me, been there...!

1. Do not drip an have a shorter session than that you have dripped for; meaning: if your drip is good for, say, six puffs, do not put your PV aside after your second drag. If you do so, liquid will drain and result in clogging.
2. Do not drip more than 2 'small' drops at a time. I know this may sound 'controversial' but, unless you are sure the exact amount of drops your atty will take and you can 'feel' that, do not over drip. Two drops will be OK in most cases and you will be good to go for around 4 average puffs. Even though there is a huge number of factors (such as size of drops; consistency of liquid; type and brand of atty; wattage, etc.) in the equation as to determine the amount you can drip, 'two' drops shall never be less than you need (they will at least provide you with a couple of puffs), and better be safe than sorry; avoiding flooding until you are 100 % sure how much your atty will take. Atties are likely to take around 4 'average' drops at a time but after a while, and depending on the intensity of your vaping rythm, that amount will result in 'a lot', so even three drops may be more than enough after the preliminary sessions. The bottom line is: with two drops you will be good to go; always! With more than that you may mess up. Of course that 901 and 510 will take less liquid, for the most part, than a 801, for instance, but then again, not every 801 or BE112 or similar will; the brand and model will not always determine that there is to be consistency in the manufacturing process to the very atty, so, the atomizer's 'personality' will vary from atty to atty. I have noticed that for the most part, in most cases, flooding or the lack of capacity of an atty to keep liquid will be due to how 'runny' or thick the liquid is and because of the placement of the heating element with regards to the center hole. In this latter case, it is possible to fix this but is risky and only possible at first with a debridged unit. And most atties lately have been coming 'displaced'. Ohhhh! And of course: debridged atties will only take one drop.
3. Try to hold your PV in a horizontal position when vaping as to avoid the possibility of draining.
4. Give your atty some minutes to cool both between drags and dripping sessions.
5. Remember that the difference between a dry and a flooded atty is ambiguous, so consider that in general, if you are in doubt it is certainly flooded. If its dry you will know... The thing is that certain signs which may 'sound' like your atty has a 'dry throat' are actually typical of flodding, such as 'rasping' drag; lack of vapor. Whereas, a lot of vapor, and no flavour whatsoever may very well indicate the need for some drops.
6. Last but not least: Remember that the quality of the drags you will get will not always be as those 'dream pulls' you get at the beginning due to minor natural gunking up. I do mention this as a reminder not to over drip in the search for those perfect drags which will only occur if the atty is completly perfectly-primed-broken-in-and-working for a few puffs. At least with most atties, the 'perfection' of puffs shall decrease and become 'average' eventually; after the first drippig sessions. Nevertheless, I would like some experts to confirm this...
So, summarizing, and adding some new golden rules, the drippers' commandments are:
1. Do not leave your drips unnattended;
2. Do not drip more than two ('smallish') drops (one if debridged...) unless you do know your limit;
3. Do not hold your unit in a vertical position when vaping;
4. Do not 'rush' when dripping and vaping;
5. When in doubt, it is not to be dry...
6. Do not aim at that perfect 'first drag' and be content with an average quality one;
7. Do not keep your atty too dry, by re-dripping at first sign of substantial loss of taste/vapor;
8. Give your atty a regular blow job; it will appreciate it!
9. Do not drip and drive.
10. Do never use cartos or carts! The Dripping Gods shall go mad..... Trust me, been there...!