My method is simple. They go into little tiny tea set cups that are just the right size. Well water is added. I know my water is good as I have fish tanks and it is well tested. If it wasn't I would use bottled water or filtered. Cover with tin foil so no light will enter. Soak in the wee cup for 24 hours or so. Then bury "hinge down" about 1/2'' deep in Solo cups. Grow.
The only issues I have had is the occasional baby pushes herself out of the soil. So, I poke a hole with a toothpick and drop it vertically in the shaft. So far in 3 years of growing seeds from Herbies I have lost 1. That was in my current group in fact.
Lots of ways to be successful but this has worked almost perfect for me.
Bob