I really like the cleaner I got but I wish I got a bigger one. I thought the 10 litre one would be all I needed but I wish I got the 30ltr one. Anyway I've cleaned a few things. I got engine carb cleaning fluid made for ultrasonic cleaning and it worked great. I cleaned a diesel injector tips but to save wasting fluid I used glass jars for them and other parts and just plain water for the bath. The 30 min max timer could have been more like an hour as I like to make sure what I'm cleaning is cleaned thoroughly. One thing I have done is cleaned rust off parts using citric acid. The ultrasonic bit doesn't do much but the heater and stainless steel bath is good for the job. After 24 hrs the bath was undamaged and my parts were rust free. By using the bath I could keep the acid warm which helps loads. One last thing the basket has rubber feet on and one of them kept coming off so I replaced them all with shrink tubes for electric wiring. A couple of layers of that and its all good.