Hello all on the other hand yesterday I had a dispute regarding convertible fabric roof and car wash systems. One said: can you drive quietly into the washing machine, but always without wax, because the wax harms the fabric roof. The other said: car wash system without wax does not work at all, because they always put wax in when washing, otherwise they do not get the car dry at all. AND: The wax does not harm (maybe it is also little useful and certainly no substitute for impregnation). Your opinion? Greetings from Frankfurt Jürgen