Help with peel and stick flooring

[Fire Me Boy!]

OK... quick question. My wife and I are putting down some peel and stick flooring in the bathroom (actually sister-in-law is doing it). We pulled up the old stuff (it was buckling, so we couldn't just lay the new stuff down on top), there's quite a bit of adhesive left on the floor... two questions, will that be a problem for the new tile and if so, do you know of anything to dissolve it that won't cause permanent damage to the floor and/or home?