I have a kitchen faucet that is starting to move around in the hole cut in the counter top. I would like to figure out how to tighten it, but due to the location of drain pipes and the disposal I can't get my head back there. I can reach up, but I don't know what I am supposed to be doing.
I took a picture back there, but I am not really sure what I am supposed to do to tighten it.
The tool you need to get behind the sink to tighten the retainer nut is called a basin wrench. You can buy them anywhere for $8 to $40. They swivel to fit and have extended handle so you can turn it from below the sink level. Yes, you have to do it by sense of feel, or position a mirror to help you see the nut. Google sink wrench or basin wrench and you will see dozens of them.
It looks like a Moen to me. The end of the pull-out hose opposite from the sprayer head should be attached to a short length of threaded pipe. This threaded pipe also has a nut on it that holds the faucet tight to the counter top. I think this nut is usually tightened with a specialty tool that comes with the faucet, so it might be a bit inconvenient to do it with a standard basin wrench.