I have never cleaned my tiles with baby wipes, but it makes sense that they might leave a little residue on the tiles. I wash my tiles well with water and a clean dish scrubber and then let them dry overnight before stamping. Also make sure that you stamp with stazon and then let it dry overnight before coloring with sharpies. Sometimes I even stamp the stazon, then bake, then color with sharpies, then bake again, and THEN seal with spray sealer. Overkill right???