How do I fix my barbecue? So I have a cheap UniFlame barbecue from Walmart, and finally...

So I have a cheap UniFlame barbecue from Walmart, and finally the container went bare on me last weekend. I go and traded it in at Circle K for the reservoir exchange, we cooked on it once and it was fine. The subsequent time we went to cook on it, the flame be very low and did not warmness up the grill past 200 degree, even on high.
So I did some research and followed adjectives the instructions about resetting the regulator and turning the reservoir on slowly and not all the road. And now it's worse. We can't even achieve the grill to stay lit. It will light for a few second and go out again.
I'm stumped!
Answers:    Unhook the reservoir from the grill ( the left hand coupler). Then open the reservoir just a bit . You should hear a big whooshhhhhhh. My guess is that they sold you an empty reservoir. I used to fill these. They can cheat the middle-of-the-road person and they would enjoy no idea. Or if it have been sitting around and someone have decided to play games after you got an leave one!! Kosmo was also right. The orifices can go and get clogged but that doesn't hapen very normally. Worst scenario is try to take it vertebrae and get another one and ty it. Then you will know it is from the cistern forward. process of elimination!

Good Luck!
this happen all the time. immensely simple to solve. you have nouns in the tube. basically de tatch the tank, turn the gas adjectives the way up on the grill even though the cistern isnt attached to the grill. this will drain the tanks. turn stale the grill after about 30 second and re atatch the tank. build sure the tank is turned bad when you detatch and reatatch. or something like that within that order but any way it should solve your problem