How can I make my Sims needs not go down in Sims 4? Press Ctrl-Shift-C and type in “Testingcheats on” (without the “s) and then you can shift click on a Sim or mailbox and stop the needs from going down. How do you make your Sims needs never go down? Find a sim who you want to cook it and max the cooking skills by using these cheats: t_skill_level major_homestylecooking 10 t_skill_level major_gourmetcooking 10.And search for angelfish, death flower, and potion of youth.Enter this cheat in build mode: bb.showhiddenobjects.