zoom switch not working. was submerged in water briefly.

Hi i had my cannon 510 fall into water for a few seconds. the camera has sat for over a year as i lost confidence it would work properly. I turned it on the other day and low behold the camera worked and the zoom worked as well after i recharged the battery the zoom now will not work again.

the camera functions completely normal except for this zoom switch not being active.i would hate to have to toss this camera as it still functions very well i am willing to try and find this switch for the camera as i know the zoom motor still works the switch must be intermittent. any help would be greatly appreciated. Thank you!

,Dayne S