Spray the green container in summers with vinegar and you no longer suffer from pests.
In the summer you have fast maggots in your gray container. To prevent this, sprinkle each time you do something like throw salt over it (salt or table salt). This prevents maggots!
Prevent the paper garbage bag in the green waste container remains.
Fold an old egg carton open and lay it on the ground. The bag will come out easily as the container is emptied.