Author Comment Last activity Moderation
michalby "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 » about 2 years ago
michalby "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 » about 2 years ago