Don't just spray them; Find out the real problem.
Remove the roller pin, clean up the pin and the inside of the roller as needed.
Apply a light coating of grease and reassemble.
If the roller is really shot, as long as you have it off, replace it if needed.
Either spend the time to service them or spend the money to replace them.
Do it right, and you won't have to do it again for a very long time.