I use a muriatic acid mouthwash.
Woa! isn’t muriatic acid solution used to clean excess grout from tile! Sounds harsh.
ROFLMAO! That explains a lot! Did you think the bottle said, ‘cleans BRIDGEwork” when what it really said was, ‘cleans BRICKwork?’
http://www.naturalhandyman.com/iip/infxtra/infmur.html