My daughter's boyfriend has a Subtank Mini. A few weeks ago, he forgot he had it in his jacket pocket, and dropped it onto a concrete floor at work when putting his things in his locker. There were no cracks on the glass, thankfully, but it kept flooding like crazy. When he got home, he took it apart and found a twisted o-ring, which he corrected. Still flooding. We cleaned everything up and reassembled it. I asked him, for the umpteenth time, if he had ever changed the coil since he got it for Christmas. He finally changed the coil. No more flooding. Being frugal is all well and good, but sometimes you just plain have to change the darn coil.
I am trying to encourage him to at least try his hand at rewicking.