I would avoid contact solution since it's not always just saline, sometimes it has cleaning solution mixed it. If you read the label you're probably fine, but I personally would look for something labeled to be actually used on people, rather than something labeled to put contacts in.
You can buy saline eye drops or saline nasal spray and use that. Just make sure it's saline and not medicated. The brand doesn't really matter, saline is saline, but you do want to avoid anything medicated. Alternatively, you can actually make saline... just mix salt and water, microwave, let cool.