I just want to be sure, is it fine for me to just clean off d2r / d2s bulbs with a clean tissue in case i touched them, or can i use a fast drying cleaner. something along the lines of windex (extremely small amount of course) ?

 

don't use windex. use alcohol with a lint free material. something like the stuff you clean your glasses with'

Gently spray alcohol on bulb and rub with cloth. then spray again, not alot, and let it air dry. make sure it's dry before putting it back in the headlight. I've done this whenever i touched the bulb and no problems.

 

Dont stress about it, use a microfiber owel to get any prints off and you are fine... Make sure to use a microfiber whenever handling bulbs and putting them in.

 

gotcha, thanks