Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Muriatic acid is used to clean concrete (sold at hardware stores) but be careful with it (strong powerful stuff) and be sure not to mix it with any other chemical, which reminds me why not try a solution of household bleach and water first and see how that works, you may have to do a little scrubbing, then rinse it with water.
