What is the best over the counter drops for dry eyes?

I was diagnosed with dry eyes almost two years ago...Everything has been fine but now after going to the beach a week ago, my eyes have been bothering me...especially the eye I wear a contact lens in...My eyes feel dry and scratchy mostly at night and in the morning...My right eye actually feels better when the lens is in...Sometimes my eyes pour tears...I tried one type of drops but it never really helped...I take eye vitamins and krill oil...I drink tons of water...Any suggestions as to what really works?