We use g101 on all first Cleans, SFG washing, cladding and conny roof work, apply scrub, wash, rinse frames are pretty much perfect from clean one.
a hand pump sprayer 2 ltr size is perfect for getting to ground and first storey windows apply to brush for higher
First cleans take longer than maintenance cleans, but get it right first time and all the following cleans will be easy and straightforward
Darran