Gold,do you have a backpack?
If so do your mix of tap water and TFR, and simply fill your backpack,scrub and clean with your pole.
Rinse off with pure,
I have a old spare backpack which i use only for TFR mix,i also have a couple of brushes that i have in the van which i use only on pvc cleans.
Jobs a good un!
Dont forget to run pure through your pole hose for a minute or so after just to flush the hose