Hello all,

for those of you who use the crystals for litter, I have a bit of a gross
question. Our kitties' litter tray gets a gross layer of sludgy stuff at
the bottom, beneath the still-ok crystals. This happens long before the
litter should "expire" as judged by the indicator crystals, which are
supposed to fade from blue. While it seems gross to let the sludgy layer
just sit there, it seems equally gross to stir it in with the rest and
make the whole thing a little bit sludgy. What do the rest of you do?

My thinking is, surely the savings in litter-related chores you're
supposed to get from using crystals isn't worth it if you have to
stir in the urine-soaked sludge every couple of days to avoid having a
whole lake of sludge underneath the crystals by the end of the month.

Thanks -Jeremy

p.s. what the heck are those crystals made of anyway? There's no
"ingredients" on the package...