I am about to lay some tile. I took up all the old squares and there is a glue residue on the floor. Before I lay the new tile, do I need to get this up, or can I pour the new glue over it? THE PREVIOUS TILE WAS A CERAMIC TILE, ONE & TWO INCH SQUARES LACED TOGETHER IN ONE FOOT SQUARES. THEIR IS GLUS STILL ON THE CEMENT FLOOR AND I AM HAVING A HARD TIME GETTING RID OF IT. ANY SUGGESTION? I AM GOING TO LAY CERAMIC TILE .GENE
