S.R.
Hello L.. My youngest LOVED a frozen wash cloth; cheap and easy. We would wet it down, pop it in the freezer for a min or so and she loved it. Also, you could just run it under cold water, ring it out, and let him go to town.
I never gave any of my children Oraljel for teething. Some Dentist claim that it relieves the pain by numbing the gums which makes it much harder for thier teeth to pop out. So it relieves the pain for a few days and then stretches the pain out for twice as long. Best of Luck.