Another thing i will do from now on is to spray bug killer in the vent while i’m doing the pollen filters, it kills all the bugs in the A/C system and takes that musty smell away (i think it harbours legionnaires disease and other nasty killer bugs too) and it make it smell a whole lot better, apparently your meant to do its every year, i have a 97 (almost from new) and its the fist time i did it a month ago, it only cost £3 a can from Ebay, but shop around (i’m a tight fisted git) i have seen them go for £18 (make sure its a large can though) you run the A/C as cold as you can (manual) turn the blowers on to max, then spray the can in the air ducts (also make sure its not on recycle on the settings) you need the air flowing from the engine bay, it only takes about 2 mins to do, you have all the covers off and the filters out so why not do it at the same time??