Hi all.my heater smells stale and damp/musty type at times.what can I do about it

hi

I had this on another car car

I bought some heater air conditioning sanitiser spray, worked well for me got rid of the smell

cheers

Joe

https://www.ebay.co.uk/itm/K2-PRO-500ml-Car-Air-Con-Conditioning-System-Cleaner-Fresh-Foam-A-C-Remove-Odour/261938753105?epid=622353518&hash=item3cfcc42e51:g:UMMAAOSwe7BWy1kf

https://www.ebay.co.uk/itm/2x-Holts-Car-Air-Con-Odour-Bomb-Air-Conditioning-Neutraliser-Sanitiser-Cleaner/302639573350?epid=1843929380&hash=item4676b96966:g:XBYAAOSwf15ahWxy

Where would you spray it.is there an inlet valve or some sort of vent to spray it in?

Hi. I use air con bomb. You start the car, set the AC on full and press the Recirculate button (closes the external vents).  Place the bomb in the rear foot well with the front seat backs as far forward as possible. Press the nozzle of the bomb (keep your face out of the line of fire) and shut the door

After about 10 minutes the bomb is empty and you can switch off. Leave the windows open for 10 minutes or so to air the cabin and you should have fresh smelling vents.  There are similar cleaners on the market. They all work in a similar fashion.  I was also told that it helps to run the fan for a few minutes after switching the AC off

 This dries the system out thus inhibiting the spread of the bacteria that cause the smell. The trick is remembering to do it.