I have had my 2008 Avenger SE for just over a year now. When I bought it February 2016, the A/C worked wonders, and was COLD all through last summer. This spring, it is not cold. it will run cool, but takes a long time to get there. I think I just need to recharge the refrigerant, but I have never done that and am quote nervous. Can someone help me out with what I need to do? Would it be better to just have the dealer do it?