If you have a dish washer put them in there. The steam on the drying cycle gets so hot its just as good as boiling water. My sons pediatrician told me to do this btw, she said the steam is great for them.
I boiled for 5-6 minutes then washed in hot soapy water.
I always just boil a pot on the stove for 2-4 minutes rotating cause some thing may warp or melt... but wash first in the sink
I always just washed in hot soapy water same as any dishes and then rinsed. Then put in.boiling water on the stove for 5-6 mins. There is.something you can.buy like a steralizing tablet thing but I never did.