I change cotton every 2 tanks.The coil legs are 4mm at the mo , and running a Demon killer Quad- 3 ID with Swag SUPREME and only had joy the whole day , want to try an Alien Clapton shortly , quick question please - I change juice [deserts and strawberry mixes] frequently and want to know when must I change cotton ?
Depends on if the profiles are complimentary and if your cotton or coils are looking slightly brown