This is the best dyi grout cleaning solution i found 10 parts water 1 part muratic acid.
Acid wash tile grout.
Apply the acid solution to the grout with the paintbrush.
Follow the warning and instructions on the bottle and be sure to wear rubber gloves and eye protection.
Set the bucket of water on the floor outside the shower door.
Slowly pour 1 cup of phosphoric acid into the water.
After 24 48 hours and you are satisfied with the job the tile and grout should be sealed to restore strength and prevent stains.
Rust oleum miracle sealants phosphoric acid cleaner is a fast acting easy to use acid base cleaner for pre cast concrete concrete masonry grout tile and natural stone surfaces.
To remove soap scum and hard water deposits from a tile wall in a bathroom mix one part muriatic acid with five parts water.
You can get from any pool store.
Fill a bucket with 1 gallon of clean water.
It attacks grease oil and soap deposits with a vengeance.
It is also important to wet the tile and grout before using to prevent the grout from absorbing the acid and destroying the grout.
Since muriatic acid is a harsh chemical mix it outside.
Slowly add 1cup of muriatic acid into the water.
Allow the solution to sit for some time on.
Fill a 5 gallon bucket with water and place a sponge in the bucket.
To use you spray it on wait for one to three minutes then use a brush to loosen and rinse it off.
Place a drop cloth on the bathroom floor near the shower.
Follow the acid clean with clean water.
A mild acid based cleaner containing citric or oxalic acid for example is the least harsh of these formulas and typically won t damage chrome stainless steel or tile.
How to acid wash a tile shower.
Fill a 3 gallon plastic bucket with 1 gallon of cold water.
Saturate the tile with water.
After diluting the cleaner as directed on the label allow the solution to dwell on the surface for 1 5 minutes while agitating with a brush.
How to acid wash ceramic tile to remove dried grout step 1.
The acid free formula is safe for ceramic marble and porcelain tiles.
Make sure you use gloves and eye protection as this is very dangerous.
How to clean tile grout with muriatic acid.
Turn on the bathroom exhaust fan or open the bathroom s window.
It can also be used with a grout steam cleaner for extra cleaning power.