I boiled my used combs lately and successfully recovered few kgs of beewax. However, it was found that the yield was very low, not even enough to cover the labor cost.
Each time I boiled 14-16 combs (together with wooden frames) for about 40 minutes, and it only gave me about 500g of pure wax, or equal to 35g/comb. This is even lower than the weight of wax foundation that I used (100g/pc). Why is it so? Any better way to increase the yield?