ive checked this out... thanks from me too!
just bought some preloved bamboozles at an NCT sale
only to try them out on DD and she was widdle out of them in 1-2 hrs! (she is a HW but at 7 weeks that ridiculous!)
So my guess was fabric softener too (coz they are super soft!) - esp when I checked out the label after they had leaked so quickly - only to find it completely blank - my clue they they have been used a lot! (so ehy are they so soft.... silly me!
gonna give this a try!