Start with basic things first, before going to the final or expensive steps. Aircond Filter, Checking on Aircond gasses and leaking or anything, compressor valve, cooling coil, compressor. There is a long list. Maybe i left out some.

Go 1st pg

I understand from one Hyundai mechanic that the stock rims for the Forte is actually very soft, therefore prone to dents. Best if you can find a set of 2nd hand rims or splurge on some new ones.