I have an H Arizonensis, I did a mixture of 25/75 excavator clay to sand after reading one board, and it wouldn’t hold when I tried to do burrows with it after it dried. Now I have 50/50 after seeing someone suggest that ratio and I think it’s too hard for my scorpion to burrow in. I just hear him scraping the top with his claws and it’s been a few days since he got in there. What can I do?? Break up the substrate and add sand?