Hi Dani,
from what I can gather from these posts is that i use a bit more saliva than they recommend on Maybe Baby. 'Cause mine takes a little longer to dry, When I first started collecing my saliva I used a scraper type impilment ( I dodn't scrape my tounge or anything, I just collected a couple of drops on it) which helped aid transporting it to the slide.
I am not completely sure how it is done using Maybe Baby, but if it is different, try using a little more saliva.

Hope this helps, don't want you to waste all your money on things that don't work, hey!!
Tanya