I have the HF model also I think I paid about $60 out the door with a sale & coupon.
I make my own brass cleaning solution from Lemmi-Shine and Dawn Ultra Platinum.
You must be careful not to use cleaners that contain ammonia, which is quite a few.
I make a gallon at a time 1 Teaspoon Lemmi-Shine powder and about 3-4 DROPS of Dawn Ultra Platinum.
Shake it good.
I usually don't let it run in the sonic cleaner for more than about 2 min.
Any more and it will start to strip the Zinc from the brass and it will turn a rose color.
My dog gives me the bird!