lol good thing you didn't try too charge double was on youUpdate: Ended up getting it cleaned. Had to use acid and scrub it by hand with a wire brush with a lot of elbow grease, then hit it with the spinner. Should've charged them double but earned a lot of knowledge.
You can get a wire brush with a full broom type handle at Interlink for next go around.Update: Ended up getting it cleaned. Had to use acid and scrub it by hand with a wire brush with a lot of elbow grease, then hit it with the spinner. Should've charged them double but earned a lot of knowledge.
agre3e with the no acid deal.....Never, never use an acid cleaner on tile and grout. This causes permanent discoloration, etching and weakening of the grout. You are doing a disservice to your customer and charging them for inferior work. Interlinks viper venom grout cleaner works great, and stay away from topical and colored sealers.
I hope you received some compensationYou’ve already cleaned those black grout lines with alkaline and acid cleaners and they are staying jet black like that? This makes me think of a job I did in the past.
I did a job one time in a million dollar house where the customer had several tiles replaced. There was a tile here and a tile there, probably about a dozen tiles throughout the house.
Well, when the contractor replaced the tiles he matched up the grout with the surrounding dirty grout. The grout was black so the contractor used black grout.
Fast forward to my arrival. I’m cleaning the tile and the grout is coming out beautifully. The grout was turning from black to white. Then I came to a tile that had been replaced. Of course the black grout stayed black. The customer wasn’t home unfortunately so I just kept going. When she got home she saw the dozen or so tiles with the black grout that stood out like a sore thumb. She was pissed at me and asked what I had done? She said I ruined her floor. I showed her how the guy had used black grout when he replaced the tile. She was still pissed at me and refused to pay. I even offered to put color seal on just those tiles but she wanted nothing to do with color seal.
Sorry to ramble on but my thinking is maybe some of the tiles have been replaced on the floor you are working on and the grout is actually black grout in the picture.