By bee's wax I presume you mean bee poo?
Even done trad, getting that off ordinary windows can be a real sod
And it also depends on the type of pollen the bees have been collecting too!
Find some way of attaching an abrasive pad (not one that will scratch the glass or perspex mind!) to your brush, or have a bucket with a dilute solution of TFR, dip brush in and pre-soak the glass, and then work out some heath robinson method of attaching the abrasive pad (or pads) and scrub scrub scrub
You can of course get specialist equipment, I think Ionics and Omnipole do brush attachments and so on....no good though if you want to go out tomorrow and do the job is it?
If the consevatory is on the flight path the bees take back to the beehive, that could be a tough job to get spotless.
Ian