Here's where I dropped laundry detergent in the grout lines. It ended up leaving stains that I couldn't get out!
Sealing your tile, stone, and grout on a regular basis is key to prevent it from getting dirty and damaged. A top reason grout is stained or becomes loose is because it wasn’t sealed or the sealer is worn down. Some people try to use bleach on their grout to clean stains, but that is a huge no-no! That actually eats away at the grout and makes it so much worse.