I'm running low on the commercial sonic cleaner concentrate so I thought this is a good time to try the citric acid DYI solution. I cannot find it at local pharmacies or canning supplies so broke down and paid the shipping for online. Thanks for mentioning this again as it reminded me at an opportune time.
"The ultimate authority ... resides in the people alone. ... The advantage of being armed, which the Americans possess over the people of almost every other nation ... forms a barrier against the enterprises of ambition."
- James Madison