Is it a chrome frame? I know that overcleaning can wear away chrome plating, but only over time and I wouldn't have thought 4 months would be long enough. Perhaps the chrome plating isn't up to much, in which case (unless you can get a refund from the manufacturer), a way to solve it may be to have it re-chromed or painted.
But still, 4 months is no time for a bike to start rusting.
Is it a chrome frame? I know that overcleaning can wear away chrome plating, but only over time and I wouldn't have thought 4 months would be long enough. Perhaps the chrome plating isn't up to much, in which case (unless you can get a refund from the manufacturer), a way to solve it may be to have it re-chromed or painted.
But still, 4 months is no time for a bike to start rusting.
Do you have any pics you can put up?