Recently purchased a budget Ultrasonic cleaner
Really good value listing is here
I can highly recommend the use of one of these well priced cleaners which have a number of uses, for me the parts and tool cleaning aspects will be the best value
A tip to start with, save the need to keep cleaning the machine, the items have been put in various containers. As the machine works on cavitation the cleaning isn’t really hampered.
Results after about 10 mins, these bolts had 90 years of junk on them!
All that’s really needed for pretty good results is washing up liquid or a non bio washing machine soap (my result) but you can use a number of different detergents dependent on the item in question and the results required.
It’s not really crucial to have the lid on if you have a heated unit.
As you can see the results are quite impressive,. these items had about a 1/4 of an inch of oily residue attached. This is after 20 mins at around 49C. The container is a cut off water bottle, pegged to stop it rolling over.