DungeonKeeper

Hi all,
I have been looking and looking for over an hour now and I cant find the post that mention about the remote working but possible the antenna for the remote being dirty. I do recall someone saying it was at the bumper section I took out the front bumper the other day and I saw no antenna or box anywhere to clean.
can someone confirm it is in the back and if after cleaning the box for the antenna still not working what else can it be or where else the circuit needs to be check. what fuse I need to check.
I also went into an autozone and they have a section to test the remote and my remote tests good.
Furthermore let me point out that I have been losing range with time to time until now it has work for over 4 months I really want this fix.
Thank you all.