When I'm fixing windows

What to do with Windows ( not that sort of B Windows but real glass types thank you )
Fixing and sealing after the initial accurate measure and manufacture must be sound.
I'm dealing with this and at the moment Blipper Arachne is falling foul I think of this just now. Hence I blip this advice from my fav window manufacturer.
Town today for tip trip, haircut and even bought a coat.
I'm on suppers so roasties, roast fennel, fish and broccoli .