I have 6 BBH bamboo fitted nappies, in amongst my stash of AIOs. I love them for their absorbency, but they are just getting really stiff after line drying in the sun. I'm following all the instructions re. half quantity of laundry liquid and dry pailing etc, but I just want them to soften up a bit. They have only been used part time on my DD for less than 6 months, so they are not old at all.

I don't have a clothes dryer So they have to line dry...

Any tips?