Anyone know how to stop THC sugar from clumping?

Hi guys,

I’ve just infused some sugar using the alcohol evaporation method, it’s been drying for the last 48 hours at 28° room temperature on a plate with a heat mat underneath , but when I put into a jar it starts to clump together, any idea how to stop this happening? Should I just buy the silica gel packets that I see on Amazon? Are they food safe?

Thanks a lot for your answers guys.