Hid Bulb Cleaning?

[Iffy]

Hi folks,
I'm gonna clean the glass & the bulbs in my coolstar lights tomorrow. I remember that grease from your fingers can seriously degrade the life of your bulbs.
My question is: Do you use any chemicals or just a damp cloth?
Stay safe

 

[Azeotrope]

I used rubbing alcohol.

 

[LeeROI]

I like isopropyl alcohol.

Edit: AKA rubbing alcohol.

 

[Hammerhead]

ISO wipes work really well. You can use any glass cleaner. After there wiped down I use those optical cloth towels. Make sure you ware gloves.