Karcher foam gun

[The Big Yin]

What dilution should be used in one of these ??? or is it just neat shampoo

 

[Has]

I beleive you just fill it up neat (shud be a level near the top)
and it automatically mixes and controls the amount fed thru.

 

[Brazo]

I used to find that a 20-40% shampoo mix with water foamed better