Seeds not cracking

Hello,

I just bought 5 white strawberry skunk seeds. 3 of them popped out in about 24-48 hours, but two of them refuse to pop. This is day 5 already. Usually 100% of my seeds open when I leave them on top of my pc (there is some warm air flowing) so I don't think im doing anything wrong.

My question is, I never had a seed take this long to pop, how many days until I give up? Isn't 5 days more than enough? If they haven't popped yet, Im not sure if they are viable. How long should I wait before im sure they are not viable?

I have had seeds pop after 2 weeks, if mine don’t open after a week ,I just throw them into soil and see what happens, as i said some will appear even after 2weeks..

Some soak in a hydrogen peroxide solution. I use ph down and bring my water to 5.8-6.0 to soak the seed in. Until it slightly cracked then paper towel.