My cafe world is lagging very bad. Plz help?

am a level 29 on facebook’s cafe world. It lags like mad..so bad that i cant even play.. Is there some way i can fix this? I have the settings on low quality but it deosnt help at all..It lags whenever i have a lot of Buzz points. But i have no door so no people are walking around. So there is no movement in the cafe except for me (the cook) cooking… But it still lags very bad. plz help thanks!