For Grout Cleaning with Porcelain or Ceramic tile ONLY! Tile Mix 7 cups water, cup baking soda, cup lemon juice and cup vinegar. Spray the concoction onto the dirty grout, let sit, and scrub with a brush.
Another bath inside whower idea: factory window shower - the BEST idea! Imagine this done huge-Japanese-bathroom style with an old claw-foot tub in an oversized shower, so you could have overflowy baths in a shower the size of a small room.