I'm running 100% this year and probably 99% over all the years. This is what I do. Sterilize a glass in the oven and then fill with distilled water. Always use distilled so you know the PH is exactly neutral and there aren't any chemicals, minerals, pathogens or spores involved. I do five to ten at a time and space the process out to a batch a week, some are my strains and some from other breeders.
Take the glass and put it in the microwave and boil the water just to make sure and then let cool to room temperature.
Let the seeds soak for 4 to 6 hours. While you are doing that take a plate and paper towel that has been folded into 4th and soak with some distilled water and place that in the microwave and nuke till it is steaming hot. That will kill off any mold spores. At the same time take a glass pyrex bowl and heat it up in the oven to about 300 degrees.
Cover the plate with the bowl and let it cool down. I try and keep everything at around 80 degrees.
Now after the seeds have soaked take a spoon (don't touch the seeds) and place the seeds between the folds of paper towels and recover them with the bowl.
In the meantime start soaking some peat pellets, again using distilled water and a sterile plate.
Check every 6 hours or so. They will pop very fast, as soon as you can see a tap root, using a sterile knife, place the seed in the peat pellet about 1/2" deep. Recover with the bowl. Number the plants in the order of popping and keep notes of the different genetics.
So by now you can see I'm fanatic about making sure everything is sterile, the ph is perfect, the seeds or seedlings are never touched. The peat pellets are moved to pots with good potting soil at about day 5. After the first 5 finger leaves are forming feed with a very mild solution food (very mild!) like a 4/12/0. The idea is to really develop good roots and stems at this point. Always use distilled water until they are big enough to handle stress.
In 30 years (even before microwaves!)I rarely get a seed that won't pop. Never had mold or any other nasty problems. And rarely lose a plant after they are put in soil. After they are moved outside is a whole different story!