What do people use for their Gecko laybox substrate? I have been using coir peat I think it is (the stuff you buy from bunnings and mix with water) and had a bad experience whereby there was some of the coir peat substrate left on an egg and I could not get it off and the egg became mouldy in the incubator. Could have been an infertile gecko egg but just wondering if there was a better substrate I could be using.