Try a bit of the old washing up liquid on yer spool, just a bit i find this helps sink yer line and its cheap and effective i always carry abit around with me!!!
Failing that dip yer rod tip in the water and make a couple of fast turns with the reels should see it sink quiet quickly!!
Hope this helps
Carl
If you are first you are first, if you are second you are nothin - believe you are the best and then make sure you are! - Bill Shankley