best way to clean internal windows at height

what is the best way to clean high internal windows would be something like this as been
asked to quote ones and looking to see what the best way is slash how much equipment cost

get a 36inch unger ninja on a wfp pole that will beast them windows the trouble with biger squeeges is if the glass is not flat wich some ant the rubber wont stay in contact an leve bits a 36inch is the perfect size i think any biger an u run the risk of this problim , also if these is lots of fly poo use one of the grean indoor kit pads there ace at geting off fly poo then u can blade after.