Hi there, recently my boyfriend and i laid some slate look tiles in our kitchen. We thought we had cleaned off all of the adhesive but now that it has dried the adhesive has left a thinnish skin on the tile which leaves it looking dirty. It is proving a pain to remove even with elbow grease and we've tried using wire wool too but nothing is working. Can anyone suggest a method or a product we can use to make our tiles look like new ( theyre only 1 month old!) Many Thanks in advance.