Acoustic guitar makes noise on second string at saddle

I just noticed yesterday that my Samick acoustic electric makes a sick sounding noise at the saddle on the second string. Sounds llike the string is loose in the slot. The strings are d'addario coated strings medium gauge. They are starting to wear and need changed. Will changing the strings help? Is there a way to fix this short of changing the saddle? I can't really afford to put it in the shop right now and of course it isn't a really expensive guitar but except for this problem I like it very much and am very satisfied with it.