dry! means as dry as possible. So source the best you can and dry it yourself again. My acetone and ipa are the best chemists can get. I probably don't have to dry them, because the bottles come with analysis results, I can se the water is really in trace amounts. Anyway, I still dry it with dry MgSO4. More
here. The same procedure for acetone, ipa and mek.
Acceptance of the fact that our reality is not real doesn't in fact mean it is not real. It just leads to better understanding what real means.