I find washing in warm or hot water, and throwing some oxi-clean in the washer really does the trick with the smell.
And especially drying pouches in the dryer.
But I don't do anything different for her laundry, than I do my own. Same detergent, fabric softener, etc. She used to HATE when I washed her stuff because her scent was gone and I would have to peel her out of her pouch to put her in the clean one.
These days she loves it, and crawls right into the clean one to do the swap.