I wish I could help Kim O. with her Midwest cage, but I have had the same problem with their "Playpen", with the `long` falls, not enough floor space at any level, and, as with you, Kim, that black tray & the `groove` around it that the cage actually "rests" in, is a problem to clean out!! You have to lift the whole cage or playpen OUT of the tray, after you loosen at least 4 capscrews! Has anyone who has or had a "Midwest Cage or Playpen" ever contacted the Co. about add-ons?? For me, since my fuzzies are over 4 & up, the FALL problem is #1 issue. They make great quality cages & combinations, & they are strong! But they missed some tiny points. thanks, john r. & the gang. jdr. [Posted in FML issue 4687]