Thanks guys for all your replies. I'm gonna do all these things regardless regardless as maintenance. Thankfully cars been running great for the whole day after changing the plugs. Weirdly, multiple of them were so loose I undid them by hand by the extension. And one of the spark plugs metal piece that feeds into the coil pack had broken off. I didn't realize it had been 3 years, 1 month exactly since I changed them. So if anyone else has weird crackles in their exhaust the plugs is a must check!