How do you get sippy cup lids clean?

WifeofaMarine

DS drinks out of these Playtex sippy cups (sorry the link's not clicky; I'm on a MAC):

https://www.amazon.com/dp/B006CUIDRY/ref=asc_df_B006CUIDRY1984727?smid=A3R6G7SKKKTT1X&tag=dealtmp10591-20&linkCode=asn&creative=395129&creativeASIN=B006CUIDRY

I wash them really good after each use with dish soap and hot water, but it seems I can never get into all the crevices in the cap. I've tried using a knife, Q-tip, bottle scrubber, etc., and I always end up finding gunk in the crevices of the lid. So, then I just end up replacing the entire sippy cup. I tried boiling the parts today after washing them (like I used to boil bottle parts to sanitize them), but I'm not sure if the sippy cup parts are supposed to be boiled.

Does anyone have any tricks for cleaning this sippy cup, particularly the crevices in the lid? We have a dishwasher, but since it's just the three of us (DH, DS, and I), we really don't go through enough dishes to use it regularly, so we hardly use it unless we have company for dinner or something. 

Torani

We have this sippy cup brush: https://www.amazon.com/OXO-Straw-Sippy-Cleaning-Orange/dp/B004QZBEBE/ref=sr_1_1?ie=UTF8&qid=1334966812&sr=8-1

It's freaking awesome.

groovygrl

I didnt use sippies much but for my straw cups when they look a little off I use the little tiny brush from my dr brown's bottles (not the nipple brush but the really small one that was for the teeny holes).

aldoussnow

Have u tried soaking them overnight in a mild cleaner and then trying to scrub with a brush or sponge.  

StrawberryAlarmClock

Torani:

We have this sippy cup brush: https://www.amazon.com/OXO-Straw-Sippy-Cleaning-Orange/dp/B004QZBEBE/ref=sr_1_1?ie=UTF8&qid=1334966812&sr=8-1

It's freaking awesome.

yup. This is what I was going to recommend. 

k.martell

aldoussnow:

Have u tried soaking them overnight in a mild cleaner and then trying to scrub with a brush or sponge.  

This is what I do, I soak them for a few hours and the n flip them inside out (as much as possible) for a few more hours.

nah82

I have this brush.  I used mostly straw sippies and was totally clueless as to how to get the straws clean until I found this on Amazon.  Now I usually give one along with every baby shower gift!