Pop bottle can be used to keep the C*** off all the delicate/hard to clean parts of your bike. I was looking into grundge guards etc, but a 2 liter and some zip ties work great.
1 piece on the front fender, 1 on the down tube and 1 on the front of the rear fender (keeps FD clean).
I extended the front fender with another fender as well. Pretty well 0 cleaning time even after 2-3 hr rides.