The catgenie is an awesome device. Haven't touched litter box in over a year. I have the entire unit with dome, door, and mat. However, the unit is still quite noisy during clean cycle. Any advice in muffling the sound. Two, despite all the accessories, the litter granules are everywhere. I can follow the trail of granules to see where my cat has been through the 2 story home, including the beds. Any suggestions to decrease the amount of granules that stick to the cat?