Try to clean this mouse again, using an alcohol-based product. Leave all the pieces lying safely on a paper towel, or on a type of material which will not allow the repaired product to stick to it. But this time, do not rush through it. You can indeed rinse it with water, but again, you need to place the components on something to which they will not stick. Give it time to dry completely, before putting it back together and trying to use it again. Do not be too impatient. But here is the kicker - figure the cost of a new mouse against the time it will take you to fix and allow the old one to dry completely. It might just make sense to buy a new mouse, rather than trying to fix this one. Sometimes, it simply doesn't make sense to repair, when the cost to replace is not so hard to take.