Airbag cover out, how’s it going??

Hello, with my pajero both covers of the airbag (driver + passenger side) are white out of print. It looks very stupid especially if I have cleaned the interior nicely and cleaned the cockpit with cockpit spray. Then after about 1 day the out of print comes through again. Then the cockpit is already shiny black-grey and the airbag covers bright grey. Does anyone like me know best how to get it away? Which cleaner?