Ahhh... a fellow snail lover in Columbia!
Humidity is a big factor. In my main tank I'd leave them where they were laid and they would hatch out. Had a lot of success until a mysterious snail crash that killed all my briggs in that tank without affecting any other species (and there were 7 species of snail in the tank at the time). Not sure if it was some brigg only disease- or if there were some trace element in the tank that was only high enough to hurt briggs but not spixis, tylos, rams, bladders, etc...
A couple of their babies had been transfered over to my invert paludarium where they are now alive and a'layin eggs (along with some new comers).
I've had much less success in the paludarium... and I think it's because there is no glass lid so it stays less humid... that, and they keep laying eggs 12 inches above the water level... I thought they were all infertile until I scraped them off the glass and discovered that the inner eggs had hatched (and presumedly starved poor things)- whereas the outer eggs appear to have dried out and died long before hatching.
Next time they lay a batch I'm going to have to incubate.
I did get a handfull of young rescued from the last batch they laid- but I don't have space for another tank- and with Spixi in the tank I doubt any/many will survive to adulthood without being eaten... I need a larger batch for any to get big enough to get past the eatable stage.