Scratching near eye and Respiratory Infection

[Sauropod8]

Hi Forum,

Moss is a male Syrian, approx 5months old. I got him in the adoption section from P@H as he had been bought twice and returned as unhandle-able.

I recently went on hols for 2 weeks, we had a house sitter for the animals. Came back on Friday last week (12th) and Moss was snuffling around his cage, sneezing, very sniffy.

I took him to the vet on Saturday (not an exotic vet, only a regular vet had availability). Suspected respiratory infection which does seem to fit the symptoms. Moss does not like to be handled so the vet visit was traumatic, he bit the vet twice!
Anyway, he has been on Baytril antibiotic (2x day), Loxicam anti inflammatory and decongestant (1x day) for the last 4 days. I haven't seen an improvement in his breathing yet.

Last night I thought his right eye looked a little like the fur was thin around it.
This morning, he has a visible sore with red skin, like he has been scratching it. His eye seems okay, just the skin around.

I dont really know what to do! I have tried to bathe the eye with warm water and cotton, but it doesn't seem crusty or anything. He is on teabag bedding and has reptile sand in the cage. I have removed coco soil, sprays and moss enrichment in case these were causing a reaction.
As mentioned, he is skittish and handling him to administer the medicine is quite a task, but we are managing so far. He weighs 120g in case that's relevant (I'm sure he has lost weight while we were away, but he is eating).

Should I book another vet appointment? I have emailed them the photo.
Is it too soon to expect an improvement in his breathing from the antibiotics yet?
It's sad to hear him sniffing and sneezing and not running on his wheel as he used to!