I did my first wash on my CB 40i today with a foam cannon and some chemical brothers snow foam.
I've always wanted an excuse to get a spotless rinse system like the CR Spotless so went to a couple local window wash supply houses to see what they have. I picked up an Unger HydroPower setup instead as it's much less obtrusive than the CR Spotless one. The concept behind these systems with the filter media is all the similar. The Unger has also recently released a consumer version of this that's smaller and cheaper they call the Rinse-n-Go
https://ungerconsumer.com/product/rinse-n-go/
The good thing about this system is I got the combo kit with telescoping brush to use it for its main intended purpose of cleaning all my house windows. I've had a service come in previously and the guys used a similar system and windows all come spotless. Easy and quick.