Would anyone have any recommendations or ideas ? I have some bottles that need to be cleaned, and the soap and water routine is not cleaning them very well. Thanks for your help.
I like the sand idea, same when I'm cleaning out fuel tanks, I use a counted amount of nuts,bolts and Dawn🤘From cleaning up bottles 40-50 yrs ago now it was a chore.
We had all sorts of bottle brushes, that could be bent at different angles to reach the inside shoulders of the bottles.
Dish soap/water/leave the nasty ones soak for a week sometimes.
If I can recall right we put sand, soap, water and shook it for long periods of time to clean the inside.
There wasn't the cleaners of today back in the early 70's when the passion was high.
I use the above to knock out all the crusties then seal and fill with apple cider vinegar. Etched back to bare metal, then neutralized with baking soda. I used to use the harsher acids. Just more expensive and nastier🤘My go to fix it guy uses muriatic acid to clean up the inside of metal fuel tanks, sparkly clean results.