So I do my own composting at the allotment but my issue is it takes so long to break down and running out of space to put any waste. I'm upto 3 bin bags for the skip now. My composting method is I put in weeds / spent veg plants etc & then strip down some cardboard into smallish pieces and put that in with it. Then I sprinkle on some garotta and water it in. I've since heard straw is a good idea too. It's an enclosed composer so should be to keep rats out. I have 2 other big metal grid composters that I inherited too that are brim full but no way to get any compost out of the bottom, no door to open. Is there any other advice I could get?