I use it by filling the wash tube with warm water and put in some sunlight, and clean with a dish washing brush (because the bristles go around the front)
and dip the brush in the water then put some (a teaspoon) onto the brush and scrub (gently) and the plastic instantly comes up, I did not have to spend lots of time cleaning the case in the photo.
I add sunlight, because I clean the inside of the cases to get the second hand shop smell out of them.
Its pretty amazing to see permanent marker pen dissolve straight off.
Its very common for ex-school computers to have ticks or crosses on them made with that blue vivid marker pen.
Its not a detergent, its an advanced compound creme,does wonders for polishing plastic like Commodore 1702 monitors for example.
it rinses off very easily with water
I had three of these Mitsubishi Green screens all in identical brown, they are now all white. Don't ask me how anyone could get a monitor so dirty, I just know they spent 15-20 years just sitting in a garage before I got them, this is one example of why I dont keep any of my computers in the garage, the other reason is the extra heat and humidity.
*Farecla G3* $47 + GST , 388 Church St, Penrose, Auckland , Phone 09 525 1000