I put the beans in a small glass of my baby/seed nutrient mix and poke them till they sink then put them directly in their home. Even premature white looking seeds pop for me this way. Not sure if it’s the Nutrients supplying whats missing, but its just how i was shown in the early 90s when i moved to Hydro and have continued. My daughter tries to tell me what happens when seeds pop but my eyes just glaze over…she has a degree and dad doesn't. Before then my mom (RIP) would use a wet napkin on the window sill but sometimes the root would get stuck and rip when removing them....sooo less stress is always better. 30 years later on my own, if I lose seeds its usually from experimentation with different nutrients / mediums / techniques…but I always go back to my roots. ;P