How do you clean interior windows in NYC?

dievca was walking by one of the corporate headquarter buildings in NYC:¬† (SAP, L’Oreal, BCG, plus Tapestry – the new Coach, Kate Spade, Stuart Weitzman¬†umbrella group, etc.) and spotted them cleaning the interior windows with a boom lift.

Pretty cool.

Wonder where they store the lift after usage ~

Photo: dievca NYC 01/2018