1. Tissue - yes, buy KimWipes. 1000000 times better, as they leave NO fluff, lint or rip easily. Get them off eBay or sometimes Jaycar.
2. I have used Bintel's UHTC. Basically it's Windex. I got smears regardless of how careful I was.
Personally, I just use ethanol or for stubborn areas, acetone carefully. AstroPhysics recommends the same.
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