The ignition rack in the steering column is typically greased if I'm not mistaken. White lithium grease or wheel bearing grease should work.
The steering column will need to come apart to lubricate those components though.
And welcome to the forum!
^^^^ This
I'll add you can remove the actual Ign. switch from the lower section on the column to check if that is failing before tearing down the column itself to service the rack and Ign. switch rod.
While the switch is disconnected turn the key back and forth to see if there is very much resistance without the switch attached. If so then your problem is somewhere between the lock cylinder and the Ign. switch rod.
If the key feels smooth and easy take a blade screwdriver and run the Ign. switch through its positions, if that is overly stiff it probably needs to be replaced.
Note: If you remove the Ign. switch it will need to be adjusted correctly when replaced on the column.
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Here's a picture of the rack (part that says Kipp), the lock cylinder (where the key goes) is on the opposite side directly across from the pinion, and the Ign. switch rod hooks on the end of the rack (out of view in the picture).
Lube:
channel the rack rides in
Pinion teeth
back side of pinion where it touches housing
Ign. switch rod where it rides in it's groove
where rack and Ign. switch rod meet