What helps a teething baby sleep?

What helps a teething baby sleep?
Use a clean finger or moistened gauze pad to rub your baby’s gums. The pressure can ease your baby’s discomfort. Keep it cool. A cold washcloth, spoon or chilled teething ring can be soothing on a baby’s gums.

Reference:
Teething: Tips for soothing sore gums – Mayo Clinic
Jan 27, 2018