Hmm that is weird, isn't it larle? I wonder if they thought lots of steam sterilising might age the components too quickly - but surely boiling would do the same, and they instructions say do that once a day? And for me, the steam steriliser was much safer than boiling!
I can't see a problem with generally wash in hot soapy water, rinsing with hot water then leaving to dry, and just doing the occasional sterilise to be sure that it is all super clean.
Lying here awake debating whether I should take more painkillers - I'd been alternating every two hours (so taking each every 4 hours) but then I thought actually there's a limit to what you should have over a 24 hr period isn't there? So now I'm worrying I've exceeded that 