Stop using paper towels. The investment to do it right is minimal compared to everything else you’ve spent to set up your grow. I’ve had a 100% germination rate using these plugs with the Jump Start CK64050, Germination Station w/Heat Mat and that is with every strain I have tried. First wet the plug and add water to the germination station.

https://www.amazon.com/General-Hydroponics-Rapid-Rooter-Replacement/dp/B0002IU8K2