My LO has been teething since 2 months of age and is now almost 3 months. He's chewing is hands and everything he can get his mouth at, being so fussy and agitated. I wanted to get him some teething gel but the box said 4 mths and above. What alternatives can I give LO? I have tried chilling his teething toys in the fridge but the cold doesn't last long and he loses interest.