Hi Guys
I dont think the question should be what cleans beter its what leave residue behide that will attract dirt? I did a test when I chose what detergent to before i swapped to microsplitters, I got hold of samples of all the detergents i could, then mixed them up to work strength next i put the liquid into saucers on the window and waited for them to dry out. the result you get what you pay for.
I know that this test was not perfect but it gave a idea what might be left behind. This would be dependant on how powerful your machine is and how wet you leave it.
With regard the prochem products and price watch the dilutions as you will also be looking for value and they do tend to affect it.
You need to remember also that detergent is only one aspect, heat, mechanical action, and dwell will come into how well you clean.
Be carefull when using some chemspec products as you can change the ph depending on how you mix them. prochem and chemspec are very good.
Why not consider prespraying and bush in and then rinse if you want to use detergents. Or use microsplitters.
Hope that helps
respect
Ian Harper