LR4 - Clumps under the fence

Struggling with clumps forming under the fence and ultimately making a mess of the fence.

Currently using the Boxie Probiotic litter though I may change because the sludge that forms is wearing me out.

Does the full covered shield dip into the globe the same way? I’ll buy it if it will keep me from having to scrub the fence every other day.

Or any suggestions for the front peeing cats?

Currently waiting for a new base so I may just be annoyed because I’ve been hand scooping the robot for weeks while I waited for the cord I knew wouldn’t work just so they could send me a new base.