To see sensor dust

What camera settings should I use to see if I have any sensor dust?

Honestly if you cant see them with every day use then don't worry about. If you can't see them with your normal settings then don't worry.

I will just tell you they are there!

Shoot at like f/22 into white background if you must.

Aperture priority mode and the largest f-number (smallest aperture) you can get (f/22 or higher, generally). +1 stops of exposure compensation (to make the resulting picture brighter). Then take a shot of the cloudless blue sky if there is one, or a blank piece of paper if there isn't. The piece of paper should be evenly lit and fill the entire frame. It's best if you have the focus off by as much as possible, too. That would mean having it focus as near as possible if you're shooting the sky, or at infinity if you're shooting a piece of paper. Take multiple shots -- the specks that don't move between shots are the ones caused by dust on the sensor.

By the way, the previous poster is right: if you don't see specks in your more stopped-down shots then I wouldn't worry about it.

Yes I see one small grayish cloud spot on the otherwise white screen in the same place frame to frame. I think I better leave it alone for fear of stiring up more clouds util it becomes noticable on everyday shots.