What to clean Orion telescope mirror with?

I always keep the caps on the focuser and the tube but my mirror is starting to look kinda dusty. What do you clean your mirrors with. I was just thinking windex but I don't know exactly what the mirror on my xt10 is made out of and if windex will be corrosive make it loose its reflectiveness. What kind of material should i wipe with to keep my mirror perfect.