Did you even read my entire post? I talk all about how I do the Mazuri calcium, soaks, bulb, how I get it dark, and I have a ceramic heater on order and will be here Wednesday. I have read both articles you posted.
No sand? Most fact sheets I have read say half sand half dirt.
Yes. I did read your entire post and that's why I offered the above info. Let me take more time and make it more clear:
No sand. Fine grade orchid bark works best. Find it at any garden center.
No red bulbs. They need it dark at night but still warm. CHE with a thermostat works best. Covering part of the top with a towel does not make it dark.
Daily soaks. You said you already are, so I just confirmed what I think is a good practice.
Calcium twice a week. You said you were doing this every day. That is not good.
Soak the Mazuri and mush it up with other greens. You said "crushed" Mazuri. Soaked is better and you only need it twice a week.
No romaine. Use endive, escarole, spring mix or other things instead.
The hot temps you are providing should help kick the RI. Just make sure humidity and hydration are kept up.