Jabo's Ace Hardware

I had to refill the spare propane tank from Ace Hardwar in Denton tap. when I attached the tank to the BBQ and turn it on. I found the burners fire is very little. I open reattach the tank , check out every part in the BBQ, turn the knobs on the maximum way and still have very little fire. Then I shake the propane tank so hard right and left , I found the burners fire go up gradually. I figured the propane quality from ACE is very bad and my issue now is how to get rid of this propane liquid inside the tank to replace it from different store. First Bad experience I have so far with propane tank refill.