Trad & WFP both frames & glass.
Because clean windows really is the gold standard. We are window cleaners, not glass cleaners. Besides, when using wfp it's very quick to clean the frames when you are at it.
But then again, are we talking about a maintenance clean or first clean? 4 weekly, or 6 or 8?
Definitely a safety device on the bottom of the ladder.
To be honest Lee, I've thought of doing this myself, but thought to myself why waste the time.
WFP is better, faster, safer, even with basic van mount gear. Trad really doesn't stand even half a chance. Trad is handy just for the insides, and a few shop windows, but that's where it usually stops.