The "nirvana II pro" designation sounds like one of the options available at
http://sailrcnirvana.com/Nirvana_Store.html If so, the "Tips and Tricks" at
http://sailrcnirvana.com/Nirvana_T_T.html should be available to you and might help. Putting a cut piece of spounge under the sheet hole you mentioned should absorb most water that may enter.