Just a thought, don't know if it would work for ya but, Clorox has a product called Green Works, I use it in the shower sump and gray water tank.
Get a small Hudson sprayer and spray between the liner and hull, soak it good and let run, do it as much as you like, then rinse with water, it will all run to the bilge and will pump OB. Green Works is environmentaly safe so no harn, no foul
Kills the bad smell, leaves a good one
1978 Tayana 37
Freedom comes when youíre ready to sail away. True freedom comes when you donít have to return
Cut off from the land that bore us, betrayed by the land we find, where the brightest have gone before us and the dullest remain behind, .......but stand to your glasses, steady,.......tis all we have left to prize, raise a cup to the dead already, hurrah for the next that dies