Has anybody used one of these computers before? I recently bought one, and overall I'm happy with it, but for some reason, the altimeter seems totally unreliable in the wet. It seems unable to maintain a consistent reading for longer than a second, regularly jumping up and down by 3-7 metres at a time, which totally throws out the total altitude gained reading by the end of the ride. I took it out for a ride on Monday and recorded a reading of 4,100 metres of climbing in a ride that would have normally had around 1,200. It only seems to do this in the wet, and yes, I have tried changing the battery in the unit.

Has anyone else experienced this? Does anyone have a solution?