You have a foundationless honey super is that correct?
The flow may be winding down where you are. I'm 500-600 miles north and will get the clover, knotweed, persimmon, sumac, flows followed by sweet pepperbush and my bee bee trees. Then we hit a mid-July dearth (mite treatment time) and await the fall goldenrod and aster flows.
The bees need a decent nectar flow to draw more wax. Making wax costs resources that they aren't willing to use right now.