How Long Does Homemade Salad Dressing Last? %%sep%% %%sitename%% I used to think salad just turned out however it wanted. Sometimes crisp. Sometimes watery for no reason. But it's almost always this. The greens are still wet. Water sits on the How Long An Opened Bottle Of Salad Dressing Really Lasts In The Fridge Creamy Italian Dressing If you left bottled dressing on the counter by mistake overnight, toss or keep?