At Which resistance should coils be changed?

[Alter]

I've been seeing vids on youtube on people washing the prefab coils, then blowing through them while closing the airholes and then reusing them. Has anyone tried this? is this a thing?

Some say soaking in alcohol, boiling the head, holding their tongue in the right place and many other theory's on how to clean a factory coil. All your doing is rinsing out some of the loose chunks and removing the juice from the wicking(smell and taste might linger or stay). There is really no way to remove the hardened residue that sits on the coil without dryburning and replacing the wicking. Burnt taste will not rinse out, its there for as long as your willing to vape that coil or replace it along with contaminating the new juice your putting in there. The sweeter the juice the faster the coil gunks up and more gunk runs the risk of burning the cotton since you have to heat up the gunk first in order to vaporize the juice and with that extra heat dissipates into the metal thus caramelizing your juice making it go dark, once the juice goes dark then every drop of juice you put in will go dark also(contaminate).
Many try to "refresh" their factory coils to save the several bucks each some of the heads are but IMO the time to rinse, clean and dry the coil and its still tastes like poo, in the end you could have made a fresh rebuild and be on your way in minutes...

 

[Smoke_too_much]

Its more for the parts. That rubber positive insulator can break, burn or simply get old from being reused so many times. Being vertical coils there is really no rewicking them without removing the coil so may as well rebuild it, find horizontal heads or be able to put a horizontal build into the vertical coil head...I dunno. You don't want to remove the wire to change the wicking, its counterproductive. I had many of my protank insulators crisp up just from being well used. Nice to have a couple heads built, ready to juice and go. Backups for your backed up backups is the norm for most of us vapers now since the future of vaping and access of getting gear is in question.
DON'T let rebuilding intimidate you. The day you sit back and take that first hit off a coil that YOU built, your eyes will roll back into your head, you'll be amazed at the night and day difference in vape quality and then you'll start kicking yourself for not starting earlier.

Good answer, yes for the parts. I've gone the other way. After switching all my tanks to rebuildables I have a stash of brand new pre-built coils that I'm not sure will ever see any use.

 

[Alter]

Good answer, yes for the parts. I've gone the other way. After switching all my tanks to rebuildables I have a stash of brand new pre-built coils that I'm not sure will ever see any use.

When I bought my protanks eons ago I also got several packages of heads. I still have all those packaged protank heads but sniped the insulators from the ones that came in the kit box. I then bought 3rd party orings and insulators so I have several lifetimes supply of protank parts. I tried rebuilding some stock subtank mini heads but they don't cut it compared to the RBA. I did try one of the factory vertical coils that came with my TFV4, got a few days out of it, turned to YUK then again I took the insulator and threw away the head. I'm not a fan of vertical coils. The Clapton that came in the TFV4 RBA was my first try at what I thought was a gimmick build...was I wrong. Today most of all my builds are claptons and my wife won't tootle puff any other build than the 1.4ohm clapton in her subtank.

 

[medleypat]

I have had good luck soaking my coils in vodka for 24 hours then water for 24 hours. Have some coils that are a year old just now staring to see a difference.

 

[SnapDragon NY]

Hi and Welcome- I use Aspire Atlantis 1.0Ω and those work very well and are cheap and easy to get and seem to last for weeks! I have stockpiled at least 20- 5packs, everytime I see them on sale or great price I order a few 5 packs at a time!
I have never had any luck cleaning the coils, once they taste burnt that is it! I have used a Qtip down the center, and soaked in hot water, only to get a couple of days out of them. Cheap enough to buy- with the FDA regs ahead I wanted to make sure I have good supplies!

 

[elPescador]

The 'scare' of toxic fumes from dry-burning coils is when using titanium resistance wire, and never recommended.
As far as your resistance fluctuating, I wouldn't be concerned. In a [regulated] mod....if your resistance gets too low, or your resistance gets too high, your mod should not fire. Not so in mech mods.
Safest practices are....when building coils, always use steam-engine. When installing [any] new coils (DIY or pre-made), always use a good ohm tester to check them before using. Regularly inspect your batteries, especially for damaged wrappers or insulator [re-wrap before charging or use]. If you have removable rechargeable batteries, charge on a good charger, not in the mod. Don't worry about the mAh capacity, but the volts capacity after a full charge.