To be honest i would recoil and rewick once a week but thats me i can't say everyone does that. You can buy coils ready-built but to be honest I don't think its worth it - much better to DIY. It does take a little time but to do it for three drippers once a week shouldn't be too bad. The main thing is the experience and nothing beats a new coil and wick so in my mind its well worth it plus it gives you that ease and convenience to switch flavours anytime you want.