I’ve got some K2 foam Air con cleaner. Is there a recommended best way of using this. The directions refer to under bonnet filter etc which was the case with Octavia 1. I have 2010 model ie filter under glove box.

Is it an actual foam or a spray?

Foam. Looking through internet etc important thing is to cover condenser unit ?

One thing that I have noticed is the vast improvement in the heating / ventilation system after changing the pollen filter. Always had the car serviced so could have been overlooked ?