A common reason the sprayer cracks is the cheap plastic it is made from and not draining the water out of it when winterizing. I managed to forget that the 2nd time I winterized. If you use antifreeze in the lines, be sure to run it through the sprayer as well as the faucet.
Glad to hear you got it fixed. And thanks to those who mentioned the lifetime warranty. I didn't know of that.
Glad to hear you called Moen. I installed one in my rig 5 years ago and it developed a leak. I tried to fix it and could not get an E-clip back on. I threw all the parts in a 1 gallon zip lock bag and mailed it to them. They sent me a brand new one back. Excellent customer service and they back their products.