Hi all, For those of you who use these type of waterers, how do you wash the bottles? I like to use a bottle brush with my waterers but I don't see how that would work with the pop bottle set up. I guess I could swish around some hot soapy water, but I feel better scrubbing a bit. Do you just keep changing out the bottles? Also, what do you do in the winter? Use a different waterer that you can heat?..I'm guessing.... Thanks!