1. Use a puff of air to clean the dust off first. Compressed air is fine in a can, just don't shake or agitate it whilst you are using it.
2. Never clean a lens dry, almost use moisture, even if it's the "huff" of your breath.
3. Really any type of solution can be used, it's just that some are better than others.
4. Should you manage to get spittle on your corrector plate and it dries up, seek help from someone who knows how to get rid of it. WARNING: Acetone is the best to remove this and it is not an easy clean for someone who hasn't used it before.
There is heaps of information on cleaning optics on this site, go read it thoroughly for tips and correct courses of action.
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