[Spyder3]

I cleaned mine this weekend with a quality micro-fibre (MF) cloth and distilled water. Simply wet the cloth and wipe to remove residue and then use a dry section to finish the job.

There had been a bunch of smears from a previous effort using some sort of glass cleaning product and probably a non-clean rag. The distilled water and clean MF cloth did the trick.

Also, I always wash my MF cloths in the washer with regular detergent, but NO fabric softener. I think that helps.