Good idea about the grease.

There is an idle screw but for the time being I would leave it alone. Does it idle low both when cold and after warming up, or only one or the other? The idle air control (IAC) and fast idle thermal valve (FITV) could both likely use a good cleaning and possibly adjustment on the FITV. I assume your check engine light isn't on? Here you can see the IAC (#15) and FITV (#8):



Both have coolant lines attached to them, but generally you can leave them attached and clean them up without disconnecting the lines. The FITV doesn't necessarily have to come off. If you take the top cap off (2 screws) you will find a nylon (or some kind of plastic) "doughnut" screwed down inside. The doughnut can unscrew itself and cause idle problems (mine unscrewed itself a bit and was causing my idle to lope up and down). I take it out and clean out the FITV with some carb cleaner, then put a little medium/low strength loctite on the threads and then screw it back down. If you unbolt the IAC there is a little screen that can get plugged up and mess with your idle as well. Use some carb cleaner and an old toothbrush to clean the screen. I also spray out the inside cavity liberally with carb cleaner.

Try that out and see if it brings your idle up to a normal speed, ~750rpm.