Both, but get the sonic first. We use a green degreaser from fleet
farm called jungle Jake, non toxic, biodegradeable. If you don’t want
to put it down the drain fling it out over your lawn. The earth is a
great filter as long as you don’t overload any one spot. The problem
with humans is we put all the toxic stuff all piled together in a
land fill and the ground gets polluted. Ground and bacteria take care
of most things very efficiently and turn it into good soil. The
little bit you are going to use is negligible.
Sonics can be used as super pickles if you have stubborn firescale
and to clean jewelry that’s caked with lotion and meatloaf before you
had them with a torch. Steamers are god too but you can do some of
that with bristle brushes after three are in the ultrasonic.