oxygen sensor ....i need help!

heres hopin you can advise me ..i have a 1995 grand am 3.1 liter.the oxygen sensor is way in behind the engine,and i tried to replace it but cant seem to get my fat hands back there to get ahold of it.i did remove the heat shield,and got a wrench around the darn thing but she wont budge.any ideas?..do i need a special tool to be able to remove this thing ,and,what should i use as a "loosener" spray to make it easier to get it to turn.thanking you in advance,smellywetdog:banghead:

Youre best bet is to get an O2 sensor socket.
Its cut out to fit the wiring through so you dont cut it.