OxiClean
Sulfamic Acid Cleaner (available at most home improvement stores)
Safety first! Before starting, I opened a window for ventilation and put on rubber gloves to protect my skin. I also recommend doing a patch test in a hidden corner before using any cleaner, especially if your tile is delicate or natural stone.
Note: My grout is gray, so even when clean, it won’t appear white — but the change in brightness and cleanliness was still very noticeable.
Method 1: Fresh Lemon Juice
I sliced a lemon and rubbed it directly
