Ac service u need find ppl that work nearby only cheap. If too far, it will cost more. The time spent driving to your house and back including toll and petrol also cost more la, samo 2 workers. 120 they can barely earn if too far away.

You just clean yourself le nowadays got sell the spray but careful la later the fins got hole u may never know. Last time I did it buy from diy, half year later start got low gas problem. But then if ask ac guy come also need make sure they are honest type, later they sabotage ur unit loosen the nut a bit every 2 months need top up gas also you headache