Lately my DT770/600 have gotten little dirty, I dont mean the earpads but the plastic/metal(?) parts, some dirt that you could scratch off but I'd prefer some faster method if there is, how do you guys keep your headphones clean? Should I try with some warm water wet towel and rub it against the dirty parts? Get alcohol or something and rub with that? I want these to regain their sparkliness once again, so tips are appreciated.

I use either warm soap and water or baby wipes.

Alcohol Wipe Sheets

rubbing alcohol always. rubbing alcohol will help clean all the deep oils and dirt that build up from everyday use. depending how oily you get i would clean them everyday at end of day when your done using them,or atleast the earpads. leather and the cheaper pleather stuff cracks and deteriorates over time if not taken care of cause it absorbs every single amount of oils from your skin. it's important to keep them clean especially if you ever plan on trading them or selling them. people tend to use just water for quick clean and that doesn't help absorb all the deep oils to give it a good deep cleaning. velour pads i don't have much experience with but should be hand washed and air dried.

if the headphone uses real metals in anyway if you want to give it new look,brasso is great polisher and deep cleaner. smells like cat litter but gets the job done. if made out any type of real wood, old english will give it a deep cleaning and bring out the woods' natural color.