Just had a few questions regarding Snow Foam. I've got a small JCB pressure washer. Small little thing. Came with a Snow foam attachment so I gave it a go this weekend. I had some pressure washer stuff so used that, Now the problem is it used it up so quick. Like a litre bottle was done within a minute. Am I doing it right? Do I need to mix it with water in the bottle? am in the process of buying some proper snow foam, something like cherry blast. How long should a 5L bottle last me? how many washes?