Have a question regarding my poop boards. I have deep litter in the coop and poop boards with Sweet PDZ under the roosts. Every couple days I use a litter scoop and clean the poop out of the sweet pdz. Every couple weeks I take a finer screen scoop and sift through the sweet pdz to get more of the smaller poop chips that fall through my litter scoop. After this cleaning the sweet pdz appears almost new, although I'm sure that there is always some pieces left over. I've had these boards installed and filled with the same sweet pdz for 5months now, I have added new sweet pdz as it gets low. Ok, now to the question: Do the poop boards need a complete empty and refresh with new sweet pdz or can I just keep going like this as long as they appear clean and not filled with poop?