u/Agreeable-Movie-408

I use Mold Armor Rapid Clean Remediation in my shower. It works so well (sparingly) that I’m sure it’s carcinogenic. I sprayed one spray on a small place of grout right outside the glass door and used an electric grout cleaner on it. It didn’t go away so I sprayed once more. NOW IT’S SPREAD AND IS DARKER. What the heck did I do?! How the heck do I fix it?!