Make your own homemade grout cleaner mixing up a ratio of cup of baking soda, cup hydrogen peroxide, and 1 teaspoon of liquid dish soap. Shake it all up and watch your grout lines restore to their original condition.
hydrogen peroxide in a spray bottle. mixed cup hydrogen peroxide with 1 cup water and put it in a spray bottle. Then I sprayed down all my corners and let it sit for one hour. After an hour passed, I wiped down.
The Best Thing We Did To This Rental Bathroom Was (Almost) Free