Q: One visitor asked, "We recently had hardwood installed in our home. The carpenters left a glue residue on the floors which have made them dull. We have tried washing the floors, but are having little success. Is there a product that will take the glue off and won't hurt the floors?"

A: You could try some warm water on a piece of cloth and a lot of elbow grease. I would call the carpenters who put the glue there and ask them to fix it.