Another unpaid shameless gtechniq fan here too!Just tried Gtechnique G6 Perfect Glass and it’s the best glass cleaner I have tried ( no strong smell ).
Bilt Hamber traceless glass cleaner is a close second but the smell is overpowering, especially when cleaning the interior windows.
I’ve heard foot stuff about griot’s (I use their pressure washer foam thing and like it), but haven’t used their chemicals.