Does the discharge from their eyes/nose smell at all?
Some pictures of your set up, and a few pictures or video of the birds would be quite helpful.
Have you contacted any of the poultry labs I provided above?
Sorry to hear your chicks are having problems.
Could you give us some more info? Are there any other respiratory-related signs like face edema, wheezing, tail bobbing, or rattled breathing, or is it just the runny nose and sneezing your seeing here?
Could you upload a video of the chicks...