a couple of microfibre lens cloths (i got mine from OPSM) - one to keep dry dry and one for the wet application of the BINTEL snake optical oil that cleans very well and no streaks. its about $10 a bottle and lasts quite well unless you actually drink it. Mike Smith has been using it for years for his hair regrowth
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no circular rubbing, and dont rub hard - its not the dishes
