As your car becomes older, or when the air conditioning system is used infrequently, bacteria, micro-organisms, mould and fungi may start growing, just behind the dash panel on the evaporator, causing some very unpleasant odours. Some even claim this can result in headaches sometimes referred to as "sick car syndrome."

This problem can be corrected by using an anti-bacterial treatment that destroys bacteria growth and leaves your car smelling fresh again.