SO OP, it has been about a month. Have you gotten faster? If not may I suggest two things:

1. Start training with intervals. Sprint for 1 min, face-paced ride for 1 m, relaxed for 1 min, repeat.
2. lift weights.

No one really discusses lifting on bikeforums, but as an aged athlete I know it was crucial to bringing my times down in track. Of course this means you cant take the easy way out and just buy a new product - which one solve the problem anyway.