This may seem like a silly question to most, first time momma here: my 4 month old son drools constantly. We change his bib 10-15 times a day. His chin and lips are getting super dry. Should I be using non scented, non flavored Chapstick on his lips or Vaseline? And for dryness of the face due to saliva, Vaseline or baby lotion? Thank you in advance!!