Charging issue

I saw someone with a similar post but figured I would make my own since I have a different carrier. I can't get my charger or my USB cable to stay connected after I plug it in. I have had the phone for several month but it has been less then a year. It's weird because this problem literally started today, yesterday I had no problems what so ever. Now unlike the other post I saw, my BB seems to be intact and none of the pins for charging to be damaged. Could it be that it needs to be clean and if so how could I go about it? Or is it something else? Also since other people have had this issue would it be a good idea to buy a cradle to charge it and only use the other for when I am connecting to my computer to use the desktop manager?