My 2 yo has conjunctivitis, but we are finding it really difficult to administer his eye drops. At first he was ok with them, we pretended to give them to his toys etc. but now it has become a battle and he keeps his eyes firmly shut, so I don't think they are working now as this will be the 4th day of him having it. Does anyone know any tricks or is there a different product I should be asking for other than drops?