We all experience some rooting loss for one reason or another. I've just learned to do my best to control the controllable and then throw away what doesn't make it (container, soil, everything) to prevent contamination.

A Heating pad and warm ambient air temps are good. Watering is bad. Beyond that the biggest thing left to say is set it and forget it. You stand a decent chance of it rooting for you because of the natural awakening cycle coming up and DSP are resilient.

If you have the time I recommend a search for a discussion thread on this site regarding how to form a callus for best rooting results by "Citizen Insane." Best of luck.