I've brewed about 25 batches by now. Lately, I noticed something about my pails. My first pail had formed an off-white rough strips on the inside, mainly around mid-height. Initially I thought these were scratches from stacking pails in storage, but now my second pail starts to show the same signs.
So I think now that this is yeast and beer deposits that layer on the sides slowly. I think I might be cleaning my pales improperly
this is what I usually do : after transferring the beer, I rinse the pail. then using water and a paper towel I remove the hard deposits of the krausen ring and any other sticky trub/yeast/goo visible in the pail. I don't scrub or wipe the parts that aren't visibly dirty. then I put some sanitizer (Iodophore solution) close the lid and shake it. before usage, I rinse and sanitize again.
Do you think this was caused by faulty cleaning?
How should I clean a pail so it'll last?