How do you remove ceramic tile adhesive from the tiles?

Remove the adhesive.

Try using a 20/80 vinager/water solution and a tile scrubber {just a stiffer brush}.

They have this vibrator tool being advertised on tv right now that looks good to me.

The easiest way is with a small jack hammer or a lump hammer and a chisel

use a hammerThe wall behind the tile takes so much damage anyway youll probably have to replace the Plaster,rockboard,drywall,or whatever they used,so id take a diamond blade cutting between the...