I went to check the oil on my dethatcher yesterday and in the dipstick tube it appears to be "milky" looking and more white than clear. I think this is from water in the oil. Even though the mower is stored inside and was washed. I just changed the oil a few weeks ago and it was fine. How would the water get there (condensation)? And how do I get the moisture out (will another oil change get it) ?