Cleaning the ear cushions?

Hi there, I have few questions that I need answered.

I have a beyerdynamic DT 990 PRO headphones, and I was wondering how do you clean the ear cushions?

Do you take them off and wash them? Or? Do you have a specific process for the best clean?

Thx!

found this link, hope it helps

I have leatherette cushions and clean them with a cotton swab soaked in alcohol (ethanol or 2-propanol usually). It worked fine so far, no discoloration on the cushions or anything. Not sure if this works for velour, though.

i think the headphones will come with a manual for how to care for them.

They probably did, but I changed apartments during the holidays, most of the boxes are still shoved in storage room, and I am just to lazy to go trough them. Their manual on internet just say to clean them with a wet cloth, but I wanted to see if anyone had any experience whit cleaning them. Advice and so...