Alivio shifter "slips" through
I have 2002 Specialized Hardrock Comp with Shimano Alivio components. I noticed that my front shifter (the one that you press to go to the next bigger chain ring in the front) occasionally slips through when I press it. I have to slightly press the shifter upwards as if it needs to make contact with something inside before it "grabs" the wire again and shifts up. I checked if anything was simply lose on the shifter, but I could not find anything. Adjusting the little wheel on the cable housing of the shifter does not seem to make a difference as far as the "slipping" is concerned. This happens mostly when shifting from the middle chainring to the big one.
Any ideas? I am aware that the Alivios are not the best parts in the world but since the bike did hardly get any use and is in as-new condition I would think that this is not the result from overuse, damage from falls etc.
I checked the Shimano web page but that did not help.