Ddj1000 channel fader

I've recently got the ddj1000 and one of the channel faders (ch2) feels a little bit loose compared to the other three.I know they have a little bit of wobble in them anyway but channel 2 feels a bit more wobbly than the rest.Is this something that will get worse with use because I don't know if i should send it back as the retailer said it shouldn't be a problem.thanks in advance.