My karcher window cleaner will not hold charge only a few seconds

SOURCE: i dropped my karcher cleaner in the pool. managed to grab it a few seconds into the pool . is it a gone case or can i still save it?

Gas or electric?
if gas chances are real good that there's no major damage!
just some minor things to do:
empty and replace fuel, and maybe disassemble carburetor and clean, then reassemble. Maybe just some carb cleaner will work, too?

if electric...
then different story.
Dont plug it in, until you are sure it is completely DRY!
use air compressor and blow out and in every nook and cranny.
Then wait a day or so, to continue drying. Keeping in a dry climate controlled area would be good.

Good Luck.