AVS Special Member
Join Date: Feb 2003
Location: Washington DC Area
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I wouldnt obsess over cleaning, it can do more harm than good. Often you can visually inspect the head with a flashlight. Clean it once in a while, which for me is about once a year.
Also, 100% or 70% rubbing alcohol is a very safe general electronics cleaning fluid, with 100% solutions better than 70%.
The thing to remember with any electronics cleaning is you want to leave zero residue behind, you dont want to use water solutions, and you want to minimize the use of abrasives. Alcohol is relatively safe because it cleans by drying the moisture out of dirt, which then wipes off or falls off.