Why do I need to use Baking Soda? Baking Soda is mildly antiseptic and very soothing to the eyes, helping to calm allergic reactions and neutralise impurities like chlorine. It adjusts the PH and it makes the baby shampoo a more effective cleanser and buffers the gas produced by the glue when it is curing, reducing possibilities of sensitivity. The combination of baby shampoo and baking soda is one often recommended by opthalmologists to care for eye conditions and irritation