I am wondering a lot about how long I can keep my coils I built, in my case on an rda. Over the course of 3+ months I have pulsed, washed and rewicked every week. I've always used light colored juices and the coil still looks like polished steel, well just about after a cleaning. I hear people saying that they replace their build every 3 months but I was thinking that maybe it should depend on the situation. My thoughts are that if the coil still is working well it can keep going. But maybe there's a time limit, then again maybe not. Will I benefit from replacing it? I know that when one uses dark sweet juices and others that can cause the coil to get gunked up, they definitely need to replace the coil more often. I'm using 22G Kanthal. I am really interested in hearing people's own experience with this so it can give me an idea as to how I should deal with my own experience with my coil building. Thanks. I really appreciate everybody's feedback.