I had the same problem with mine but the last couple of times has been better. I bought ours new they have now had about 10 washes so I think these do take quite a while to get up there absorbancy. Hope you find a way to make them work for you.
Callum has lasted overnight in Bububebe without any extra boosting and they are always fine for us during the day usually lasting 3-4 hours.Which is a big difference to the DNF , I would never try those overnight .
ohh if you do sell I'd be interested!! I fold like the others said but also have to boost mine with a puddlekins bamboost to get them to last 3 hours. Our bububebes with the same boosters last 4-5 hours so they seem more absorbent than the DnFs