How often should car air conditioning be serviced ?

How often should the aircon be serviced on my car?

Should I keep the air con on all the time in an EV?

I had followed your advice to always keep the air con switched on, and to good effect in that with my vehicle owned from new for 20 years it has always worked fine without ever even needing re-gassing....

Can I trust my garage to use the right air con gas in my car?

How can I trust a garage charging me for an air con regas to not put the cheaper gas then charging me for the dearer gas?

Should I use my air con in the winter?

I have just bought my first car with air con. I have been advised that i need to run it all the time to stop the seals drying out. This may be okay in summer but I prefer to have the heater on in winter....