I usually wash the inserts (after a cold rinse) at 60 degrees - I used to wash them at 40 degrees but noticed they were getting a bit whiffy.

I rinse the pocket nappies too and then wash them at 40 degrees. But most of the time when I get them out of the washing machine they're still a bit smelly.

My question is can I wash them at 60 degrees all the time or is that likely to damage the outer fabrics? I have minkee, cuddlesoft, plain PUL, patterned PUL, velboa and fleece outers.
I'm sure I shouldn't be washing them regularly at 60 degrees but everytime I wash them at 40 they still smell.

I use bio liquid and a bit of vinegar instead of conditioner.
Every month or so I run a hot wash with the washing machine empty.
Any ideas what I can do to solve this problem?
Helen xx