harvesting cactus seeds

[ZooL]

I had a go at trying to cross a few different (what i think are) epiphyllum that i found around the place when i moved here, not sure if they crossed or just self pollinated but all the flowers i tried it on made larger fruit where as the ones i left or tried to self pollinate either shriveled or made small fruit.

When i collected the fruit i separated out most of the seeds from the pulp, then washed them, then spread them over some paper towel to dry, when i came back to them i realized this was a mistake as they were all effectively glued to the paper towel once dried and it took me forever to get them all off.

Anyone have some tips of a better way to do it, or if even separating them from pulp before drying is even necessary or if it's better to just let fry in pulp and then seperate.