Thinking about getting an ultrasonic cleaner

I have a fair amount of cartridge games and from that, a good bit were bought from friends or ebay. Nearly all of them, are 2-3 decades old (natuarally, right?). I'm looking to get them as clean as possible and thinking about getting an ultrasonic cleaner - pulse with degas. But I really can't find anything definitive online with them. I've seen some videos of people using ISO in their cleaners, and I just turn off the videos. I know you need distilled water with a surfactant.

I know certain capacitors can't be in an ultrasonic environment for over 2-3 minutes but I thought that was only if heated above 65. Also, I'm thinking of just replacing the caps on the board anyway. I don't think I've ever come across a board with a oscillator. If I'm wrong on this, please let me know.