I have a miriad of questions: the first..I have removed the old marlite from between the kitchen counter and cabinets, but there is old crumbly glue stuck to it. What is the best way to get it off? Second...my basement is cinderblock, and in one room the joint filler is crumbling. How do I fix that? Can I put drywall compound over it? The third question...the bathroom toilet won't flush right, you have to hold the handle down. Could the chain be too tight, or too lose in the tank? Thanks so much, I have no clue!!