I finally did some repair work on the crossed combs in my 1 y/o TBH. They had a lot of surplus honey and we are not even in the main flow yet so I did a bit of trimming and added empty bars between straight comb. After crushing, the drained combs went in my solar wax melter for rendering. I ended up with a nice quantity of beautiful yellow wax but the older darker combs don't seem to be melting. They have reduced somewhat but they have yet to completely melt. Will these eventually melt into a usable wax or are they a disposable by-product? Thanks.