Germination Issues?

I find sitting it on a radiator or near such a lot of heat can dry things out too quick. I would give the seed tray a good soak. Put seed on top and then add some on top.
Lid on the prop and try it away from the rad. I have no issues adding a little warm water to keep the seed tray moist.
I have some hot spots in my house - one windowsill has a rad under it and I get most failures there due to the trays drying out too fast.

Hi Scarlet

Here is the propagator, are you saying I could/should put water in the tray?

https://www.waterirrigation.co.uk/catalo...ory/16738/