Yes, sponges work just fine, as the sponge helps hold in moisture. (to a degree) the Master Kush clones I purchased were cloned in sponges. And once you put them in soil, you can keep the sponge moist for 10 days or so to ensure the plant takes to her new medium.
(ps; did you know that 95% of women prefer the term 'WET' INSTEAD of the term 'MOIST'
It's not fully understood or know why, but women in general, do not enjoy the word 'MOIST'
So have fun with THAT knowledge to guide you.