Can't get all the air out of coolant
 

Drained the coolant awhile back and replaced with WaterWetter and distilled H20 for the summer only...quite a few miles under my belt but still have air bubbling from driver's side head area on shutdown...have jacked front of car up and run with rad cap off...loosened TB coolant hose at rear of block until coolant flow while running but still persistant air in system. Would have thought it would have "worked" its way out by now. Any further hints/suggestions in this area would be most appreciated.

Cheers,

Craig