CayCay,
I pretty much drip only. I LOVE using low resistance 510 atomizers. Anyone using a 3.7v device with a battery that is more powerful than 400mah should use nothing but LR atties. If you have an eGo battery, it will work great with them. Here's how I do it: I take the plastic wrap off of the new atty. If it has a cartridge, I take that sucker off and throw it away. Blow as much of the primer out into a paper towel as you possibly can until it is as dry as possible (that stuff is kinda nasty). Put 5 or 6 drops into the atty to prime it and take 3 or 4 drags. Put 3 more drops in and those should last somewhere between 5 and 10 drags before the flavor starts to change and you know it is time to put 3 more drops in. Continue on 3 drops at a time as needed. Don't forget to cap the whole thing with a decent drip tip. Sometimes I'll go 4 drops because I love that gurgly sound, but if you don't space it out right you might flood it. Just keep a paper towel handy to wipe off the bottom of the atty and the threads of the battery if this happens. Once you get used to it you may go days without the slightest leak. If you have an automatic battery, which seem to be increasingly rare, dripping may not be a good idea. There is a hole going through the battery and dripping juice into that is a no no. If you have a button on your battery, you are fine. Also, there is clearly no hole in the center of the 510 fitting that would lead to the battery's innards.
Switching flavors: Keep some
Unflavored e-juice on hand. If you really want to do it right, blow the old flavor out into a paper towel like you did the primer, and then put about 5-6 drops of Unflavored in the atty, vape it for a little while, add 3 drops, vape until the old flavor is gone. Shouldn't take long, but some flavors do stick in atties a little longer than others. You can also skip the blowing out part if you want, just switch to Unflavored for a little while, and vape until the old flavor is gone. Apply new flavor, and repeat all of the above. This is my normal method throughout the day. I typically switch flavors 3 or 4 times a day and I pretty much use one atty just about all the time. I always thought it would be weird or pointless to buy Unflavored until I discovered how useful it is. I also discovered that I like to have it around when I feel like a nice fresh, clean vape too. Since it is just the base mixture and no flavorings are added, it is theoretically the thickest juice we have, and also has the highest VG content. It makes GREAT honking clouds of vapor. I hope this helps!
Brandon
Ms T's Bakery
