The sprayer is cracked and leaks like crazy. The replacement I bought does not fit on the existing hose. I thought this would be a real easy to remove the existing hose and put a new hose and sprayer in. I think it's one of those quick-disconnect types, but I can't figure out how to disconnect the sprayer from under the sink. Please see the pictures below. Any ideas would be helpful.
Edit: For reference, I have recently learned that this assembly is a Pfister Marielle faucet.