First of all ive had a cat with the string issue... not fun at all.


As for the sponge... I dont see it being any different than the paper towel. In fact I would be careful using a sponge as the root can pierce it and try to root in the actual spongey material. It is very similar to a rapid rooter material wise. If that happened it could kill your seed trying to pull it out.

Besides, the paper towel method isnt that much of a pain is it?

Just use rapid rooters instead of either way and you will be much happier!