I picked up a 300N and ran into a snag. While attempting to steam out the knot, it fell off its perch into the water. The bottom of the brush bubbled out. I assume because it was floating on its side, air worked its way into the handle and deformed the bottom of the brush as it was trying to escape. Is there a safe and easy way to push the bubble back up? I'm sorry I don't have any pictures. I can take a couple if necessary. This has to be a relatively common mistake. It didn't take long to happen. Thanks for any advice.
Ever-Ready 300N, or general brush restoration advice needed