I'm driving a new to me 2015 vista 31KE so have different slides but I'm always open to hearing about what's going on with others. Tell us more about the leak? Assume you are speaking water leaking in? Top,sides, open, or closed or what's up?
One leak I had not thought too much about was mentioned in the manuals as part of putting the slide back in.
Seems simple enough to push a button and it all comes home but the manual mentions any water left on top can come inside with it! Better to use the jacks to tilt the RV and let the water run off out where it belongs!