Your Favorite Mono

[Loose Neutral]

I recently bought two new rods and reels. an ultra lite and lite rod and spinning reel. I figured I try some main line fluoro. I bought the Berkley vanish. 4 and 6lb test. after casting and retrieving my line my rooster tail or any lure im using just spins in circles for a minute or so. its as if the line is all twisted. I spooled it on my reel just like I always have. im not sure if I did something wrong or its the Berkley vanish line I purchased. any advise will be much appreciated. thanks guys