Electrical Issue

I know this sounds stupid but like I said I changed all the bulbs out when I got the truck but i took them out again just to check and somehow on the bulb on the left somehow the plastic melted over the metal lead so there was no connection happening… something so little that gave me trouble for 3 months… never checked it though cuz the bulbs were brand new… might have been bad before I took it outta the package though who knows… thanks for the help though… coulda spent a lotta money on nothin