Are the inserts completely saturated when it leaks? If it's saturated she just needs more absorbancy.
If the insert isn't saturated...
Is the fleece/suedecloth repelling? You could scrub them down inside and out with dawn and a toothbrush.
Does it seem to be going through the thread holes? Drying them on HOT for 15 minutes could re-seal the thread holes.
Are you using a detergent with optical brighteners? I think that can cause build-up.
Are you using hemp inserts? Hemp doesn't absorb as quickly as cotton or microfiber. Pairing hemp with cotton (cotton insert being closest to baby) will make a super absorbant dipe.
I don't know what else to suggest.
If the insert isn't saturated...
Is the fleece/suedecloth repelling? You could scrub them down inside and out with dawn and a toothbrush.
Does it seem to be going through the thread holes? Drying them on HOT for 15 minutes could re-seal the thread holes.
Are you using a detergent with optical brighteners? I think that can cause build-up.
Are you using hemp inserts? Hemp doesn't absorb as quickly as cotton or microfiber. Pairing hemp with cotton (cotton insert being closest to baby) will make a super absorbant dipe.
I don't know what else to suggest.