Hi, I'm fairly new to all this. I have a little vape pen that the guy at our local carryout recommended. We live in a rural area so no vape stores. Anyway I have to change the bottom dual coils a lot--maybe 2 or so times a week. Recently I read that I shouldn't need to change them but every 3 weeks or so. I change when the vape produced is significantly decreased. So, is there a way to clean the coils so that I can get more life out of them? This is getting expensive. Thanks so much!