Cheers, feared it may be far more technical than washing them a different way! I don't have a cold rinse on my machine, but have recently cleaned the machine and pulled all the baby wipes that had got caught in the pipes out, so it should be working better. I always use the long 40 cycle with powder and throw them one the odd 60 and occasionally do an extra cold wash in lieu of a rinse, so I guess I have sort of stripped them already. I will try the dishwasher tablet idea though!!
Thanks again for taking the time.