I am a DIY'er who normally uses a solvent parts washer to clean grimey differential and transmission internal parts when I do rebuilds. I am chemically sensitive and have to wear a full face respirator when I work with solvents, so I took a chance on trying a bioremediating benchtop parts washer, figuring if it worked, it would be better for my health. I got the BenchtopPro when it was initially offered for around $230 for a kit, that included the benchtop unit, cleaning fluid, and the bioremediating packets. This kit sells for around $300 now. I have now used it for a few weeks trying to degrease differential bearing caps, carriers, bearing races, brake rotors, and the like. I have found the Chemfree "BT5" cleaner supplied with the Benchtop Pro parts washer to be VERY mild...it takes a lot of scrubbing to get anything done and at that point you are cleaning more as a function of mechanical abrasion than you are really using the BT5 cleaner to accomplish much. I contacted the company that sells the parts washer and they told me I was their first and only complaint about the BT5 cleaner not being very effective. To their credit, they sent me more cleaner for free, asking me to see if maybe I had gotten a bad batch the first time around. The new cleaner is the same. It is "better than nothing" for extremely minor cleaning jobs - you can take the light oil coating off a brand new brake rotor with this cleaner, but then again you can accomplish such a minor job like that using a hand spray bottle of purple power or simple green, or dish soap. I am glad I only paid $230 for this thing. It is better than nothing, and I will use it for small jobs because it saves me from having to use solvent, but I will still rely on my solvent washer for any real greasy parts washing. The BT5 cleaner acts like a mild soap - it will only help float off dirt that is very soft and already easy to remove with a brush. It does not seem to soften any kind of caked on grime, whereas a solvent parts washer would quickly dissolve and rinse away that type of grime with the aid of some light scrubbing with a nylon brush.
Here it is.
It's a nice idea but definitely not a replacement for solvent parts washer. I was hoping it was going to be a more effective degreaser than it is.