Hi everyone! So I am going on my 7th month of breastfeeding (woop-woop!) I also pump & I use the Medela In-style Backpack. I clean the parts after every use but yesterday I noticed that deep into the valve part was some white residue. I tried getting in there with the nipple brush & it wouldnt reach, so I tried boiling the pieces. So here I am with the residue still in there & now the parts look cloudy! Can someone please tell me what the heck Ive done & how to get the parts really clean? Im freaking out over here. TIA!