Do you want to know a secret? Remove ceramic tile grout is very simple, clean, and fast. Yes, the task you have been afraid of several months, even years? - just a few hours. A warning is, although you can manually do it all, if you want to make your work index more easily,you cab buy oscillation knife (detailed) in the next step. Why do this? Your current grouting may mildew cleaning both inside and outside. You may want to freshen up ceramic tile grout by changing color. Your existing grouting is chip and fall off. Rather than patching, you wisely decided to delete all, regrout. Using multiple knife, you can delete 15 square feet of grout 4 "x 4" about an hour.