me too! i was using fused clapton wire. the cotton seemed to get dark like within one tank. thing is that i never got a dry hit or anything. I checked often right after vaping i would unscrew the tank really quick to make sure my wicks were not dry so I dont know what the deal is with that. I also only made 4 wraps so the coils were getting max airflow coverage know what I mean? I can't figure out why they gunk up so much faster
Depends on the juice. I usually use medium to dark colored juices and my coils and wicks get nasty quick. But I recently got a clear juice and it took five days for it to even start turning brown.