2013 Prius Wobbles at certain POWER settings

A .22 gun bore brush in a drill, with gunk works very well!

 

That's an excellent idea, I should have done that when I was cleaning mine awhile back.

 

Brushes for cleaning stainless steel drinking straws work good too. Google slim bottle brush on Amazon, you'll likely get a deluge of options.

I didn't bother with a power drill (overkill?), just insert the brush a bit, then tuck in the straw from brake cleaner can, give a squirt, work the brush.

 

The bore brush has stiff bristles, and can clean out the carbon, used with Gunk.
With the drill, you can run it through each hole for 5 seconds and be done.
You don't need run it at a high speed, unless you want too.