the skill with wfp is speed vs quality.on regular cleans simply follow the rule on every window of 2 agitations of glass and frames - rinse then 2-4 left to right of sills. Also on regular cleans with frosted windows, 1 agitation and no rinse, 1-2 on sills.
If you clean every 4 weeks dont do frames unless they look dirty and try rinsing on the glass , also get a pole trigger it saves loads of water so that you can work with high flow rate this will save you time.
because its quicker to rinse on the glass and it saves the strain on your body, keeping you going quicker for longer before getting tired