I see a lot of rockwool hate around here from you
@Airwalker16 but I can assuredly say that I've never lost a seed and I've popped every single one in rockwool. I don't follow any crazy guidelines either, I drop a 1.5"x1.5" cube into a bowl of water (tap, not pH'd) for about 30 sec, I take it out and give it a shake (not a squeeze), I drop a seed in the hole, cover the hole, and then close off the block in some tupperware (or I use a ziplock bag). I'll burp it with fresh air every 24hrs until I have a seedling (usually a few days). It's so insanely easy and has never given me a problem going back to the mid 2000's when I started doing this.