How do I fix screeching high pitch brakes when braking?

I drive a 1999 corolla with 116,000 miles on it. I recently just replaced the brake pads and after that it started having these high-pitched screeching noises like nails on a chalkboard. I've been researching online and many people say it's the pads, but I've just replaced it 2 months ago. So what's causing this matter? I believe it's happening in my front brakes. I looked at the brakes and there are some brown rust on it. Should I take out the wheels and clean it with a metal wired scrub and some brake cleaning sprays? I know nothing about cars or brakes except there's the rotor part, disc part, and pad part...I took it to the mechanic and he changed the pads, should I change the rotor ad disc too?How do I fix screeching high pitch brakes when braking?
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I'd bother writing it up....but you could have figured it out on your own.How do I fix screeching high pitch brakes when braking?
check the clips as well as the brake pads. sometimes those clips will rub on the rotor which will cause that. also pull the wheels and take a rag soak it in brake cleaner and out it on the rotor front and back and spin the axle with the rag on it to clean the front and rear of the brake rotor. try that and if nothing else deal with it.How do I fix screeching high pitch brakes when braking?
its the brake pads that why there are different price for the pads different materials they are made of and some have silencer sprayed on the back of the pads to stop the noise

silk comforter

cook fresh salmon