Do you sterilize the spectra flange after every use?

Yes I do!! As the flange is made from pp plastic, they will age faster in uv sterilizer. So I use steam sterilizer with them! When they age, do remember to change out the plastic as they may start to leech harmful chemicals. Replacement parts are available on shopee https://shopee.sg/product/242594539/7732031072?smtt=0.0.9