Plug plants/Jiffy 7s

I've just found some really old jiffy pellets in the GH. Giving them a soak to see if there's still life in them!
Having Duck,ducked them I see they're doing Coir pellets now and some have paper wrappers.
They're so easy and mess-free, and bags of compost are of such variable quality, that its tempting to try the coir ones.
Has anyone done so, please?

Veggie if the jiffy pellets are peat based, try sitting them in water with washing up liquid added, evedently an eco soap would be better, but not an absolute necessity, the soap breaks down a waxy skin that forms on peat when it dries out, it's this skin that stops water absorbtion on the pellets