wheely bin liner, sulphur strip in a perforated tin on the top of the boxes, with a crown board on top so you don't melt a hole in the liner once you light the strip. Pull down the bag around the stack and don't inhale the fumes or get them in your eyes etc. work from upwind.
I'm giving the sulphur strip method a try this winter so I'll tell you in 3 months Heather
The instructions say no contamination just air them for an hour or two before re-use. I hope it is successful because wax moth (greater and lesser) are a major problem in this area