Comment Last activity Moderation
"I used sodium perchlorate (bleach) to clean schott funnel (filtration funnel) from tea tannins residue (in a plant biochemistry class). I'll try wi..." | Read more » over 1 year ago
"Mineral oil should work. I sometimes use on a professional immersion objectives a mixture of drugstore-bought liquid paraffin (sold as a laxative) ..." | Read more » over 1 year ago