I just discovered a hairline crack near the waterline on my vacuflush head. It looks like it's just in the glazing. More cosmetic than anything else. Anyone ever see this? Nothing hit it. Could be a stress crack but I don't think so based on the location. I don't want to paint over it with one of those repair products for sinks and tubs. I will never match the color and it will look worse than it is now. Something like a crayon may be better. Any suggestions?