Good morning everyone! Hope all is well. I have a question that I'm hoping someone can answer. My 6 year old is pumping with Ping and Humalog and we are using inset 30 sets. The tubing gets cloudy in spots and I'm wondering what the heck that is. We change sets every 2 to 3 days and replace cartridge and tubing probably every 4 Or so. I wait for the insulin to get low in the cartridge and I usually fill to 95-110 units. Is this the crystallizing of Humalog? Thanks in advance for your help.