My bathroom tile job turned into a weird science experiment
I decided to try that trick where you use dish soap in the grout mix to make it smoother. Saw it on some forum, figured why not. Mixed up a batch for my small bathroom floor, maybe 50 square feet, and added a good squirt of blue Dawn. The grout went on fine, but the next morning it looked like a mold farm. These weird, fuzzy blue spots were growing out of the lines. My wife walked in and said it looked like a petri dish from a high school lab. Turns out the soap had sugar or something in it that bacteria loved. I had to chip out all the grout, scrub the lines with bleach, and start over. Has anyone else had a home fix tip go totally wrong like that? What was your worst one?