Only the nipple/ring. The holder maybe once a week unless milk drops on it,,,,otherwise it doesn't come in any contact with the milk so its usually pointless to wash it!
Oh also I want to mention we dont use them for every feeding because we also use the dr.browns so if we used them daily we would probably need to wash them more ofton, probably like every other day or so. We just stick all the bottles in the dishwasher though.
The nipple/ring get washed after every feeding. The other part gets stuck in the dishwasher with everything when we do a load (every other day). But like you, PP, we alternate those and Dr. Browns and don't use them every day.
Dee,
Mommy to: Sofia, born 2/9/11, as well as three dogs, two cats and a multitude of chinchillas.
I rinse them out when I wash the nipple out and put them on the drying rack. I wash them with the brush when they look dirty. I use a steam bag to clean the nipples every night. You can't put the holder in that or it will melt (I learned that the hard way)!
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Re: Those that use Playtex Dropins