I have previously treated my car with Air Con bomb which has done a bang up job of getting rid of the musty 'rotting carpet' smell caused by bacterial accumulation in the system. Unfortunately, when I treated the system this time the rotting carpet smell was replaced by an overpowering smell I can only describe as well stewed sweaty feet. In an attempt to fix the problem I replaced the pollen filter (which was black and full of fluff, leaves, seed pods and I don't know what else). This did not cure the problem so I treated the system again with Comma air con cleaner. The smell still persists although the citrus tang of the Comma does alleviate it a bit. The problem is worse in the hotter weather when you really need the air con. I suspect that the ducts contain dead vegetation or worse. Can anyone tell me how I can access the ducts or does anyone know of a cure?