Hello Kate !
 
To remove all the beeswax AND the propolis from your plastic of your O.H.
1. Don't use any solvent : they'll attack the plastic ...
   the alone to use are methanol or ethanol but dissolve only propolis
2. Try to use hot water (60-70 degrees C) with
          - tri-sodium phosphate + a common detergent.
          - or the powder for dishwasher : it's generally ok !
 
  Personnally I scrape * all* the wax and the propolis and I put the
glass or the plastic in the dishwasher (dubble program).
 
Pay attention : Some plastic don't resist at the temperature of the washer!
 
Good luck !
 
Jean-Marie                   [log in to unmask]
 
Jean-Marie Van Dyck
B.P. 102
B-5000-Namur (Belgium)