Yeah man; I’m not really sure how much I would trust a $2.99 anything like that…
I mean, the cleaner is reasonably complicated and needs an ultrasonic generator, if it’s $2.99 it’s probably a piece of junk.
For reference the one I actually own is here:
If you’re going to go this route, like most things in life, spend a little bit more money and get something that’s going to do the job right, it’ll end up saving you a lot of trouble in the end.
Keep in mind, you can use these things to clean pretty much anything metal that can fit in it, I use mine to also do my glasses, small metal parts to various things, etc.
Anything that can stand to get wet and will fit will get incredibly clean inside one of these, it uses ultra sonic pulses to remove grease, dirt, oil, etc.