How to properly clean a glass out of a lens

My old and beloved Nikon 300/4 which I got as a present long time ago developed fungus, sent it to Nikon in Italy to fix and after a huge amount of money it developed fungus again, I bought the tool to remove the securing ring off the lens as to disassemble it, not too big of a deal (fungus at this moment only on the back of the front lens) but I need the proper liquid to clean it before I reinstall into the lens body, what should I look for onto Amazon (to mention one...)?

Thank you

Iso-propanol (also known as propan-2-ol, or 2-propanol) is generally considered to be highly suitable. You'll want a high purity grade to prevent muck being left on the lens afterwards).

It sounds like you need to invest in a system for keeping the humidity down in the area you store your lenses. Fungus only grows when the humidity is high enough. A drying cabinet might be the ultimate solution, but a bag with silica gel pouches can be sufficient IF you dry them frequently.

petrochemist wrote:

Iso-propanol (also known as propan-2-ol, or 2-propanol) is generally considered to be highly suitable. You'll want a high purity grade to prevent muck being left on the lens afterwards).

Thank you so much for your prompt reply, I will look up for it, am pretty sure AmaZZon might have it

It sounds like you need to invest in a system for keeping the humidity down in the area you store your lenses. Fungus only grows when the humidity is high enough. A drying cabinet might be the ultimate solution, but a bag with silica gel pouches can be sufficient IF you dry them frequently.

The lens was probably store in a dump environment, it was a present I got in the late 90s if I recall correct, none of the other lenses I own, fortunately, developed any.

Grazie!