Dude, I'd go to a service station with a problem like that. I think it's hard to solve it on your own, there are a lot of factors to consider. I was recently at a family dinner at my brother's house. We were sitting at his house and everyone got hot. We asked him to turn on the air conditioner, and it gave off such a horrible smell, like a football player hasn't changed his socks in a year. Thankfully the weather was nice, and we moved to the terrace. He then tried to solve the problem himself, but it didn't work. He had to use a cheap aircon chemical wash singapore. That's why I'm sure you should leave it to a professional.