Last year, I got a new 27 gallon air compressor. I try to empty the tank at the end of each day, but most of the time I don't remember that task. I just noticed that I'd left the compressor on for at least a couple of months (another no no) and had never emptied the tank in all that time. (I'm a tax CPA. Things get a little hectic until April 15, when I then focus on all the other client matters that were put off because of tax season.) I just emptied the tank and noticed that the water sprayed out was rust colored. Other than doing a better job of emptying the tank at the end of the day, is there anything else I should be doing?