How to clean tile grout with acid the easy way

This is the best DYI grout cleaning solution I found, 10 parts water 1 part Muratic Acid. You can get from any pool store. Make sure you use gloves and eye protection as this is very dangerous acid! Don't use much, it does not take much acid and a good grout brush and your tile grout will like like brand new with minimal scrubbing! Cheers!