I think if its been working for you and you havn't had any problems with it, why change? As long as you don't smell like food when you reach in there, you should be fine. If you change the way you feed now after so long, the snake might be stressed by the change, and it might even stop eating. (though I doubt it.) Hope this helps.
-You can search all day for something and never find it, only to see it in the most obvious of places after you've stopped looking.-