With this heat like it is cars air conditiners are working overtime right now , there are a few things u can do to help your a/c run smoother , first off make soure your coolant level is full , low coolant make the radiator run hotter and make the a/c work harder, thenu can take a waterhose and spray down the front of your radiator, and if there are bug, grass clippings or leaves, mainly any debris get it off the front of the radiator, run your a/c on recirculate but then every couple days switch it to regular a/c that keeps the ac cleared out inside of your dash, then on the newer model vehicles id say 2005 and up there are what is call a cab air filter, it needs changed about once every year, if u have a damp musky smell it could be the filter, and if your a/c is cycling in and out and not cooling good it may just need a boost of freon, if you are unsure if your vehicle has a cab filter puut the yr make and model up and ill be glad to see if it does. or if u have just a general question just ask and ill be glad to help.