Cage need closed cage ideas that's easy to clean

Hello everyone, i am fairly new to the whole guinea pig world, and i am looking for some tips..... I have a cage that is 3x2 with two girls in it. and i use fleece and towles in it.....my problem is i don't have grids at the moment and it's a little to hard to get to the back of it to sweep it out so i'm thinking i'm gonna end up remodeling it again, but not sure how i want to do it. So i was wondering if anyone has any tips on designing a cage that will be easy to clean out but still gives them plenty of space to run and play? it has to have a lid on it though cuz i do have other animals. I am attaching a current pic of what i have set up right now. if you want to post pic's of your set up and give me tips to why it works for you or doesn't work I would love to see and hear from anyone interested Plus i just like to look at the different cage ideas lol....ok so here's my cage.