My front side button is registering as a left click on my Tenz mouse. How do I fix this?

I spilled a little bit of water on my Tenz mouse (small size) and that caused the left click to break completely, but after letting it dry I cleaned the inside with alcohol and the left click works again. But my problem now is that my front side button is registering as a left click and my left click doesn't work on drop-down lists or moving tabs around (if that makes sense). Any advice on how to fix this?