ᐅ How can I prevent Ikea Besta furniture from wobbling permanently?

Hello everyone, some time ago I bought and assembled several Ikea Besta furniture units. Unfortunately, I have noticed that despite careful assembly, they start to wobble slightly after a while, especially when I use them or lean on them. I suspect this might be due to insufficient stability of the base structure or the connecting elements. My question is: how can I prevent Ikea Besta furniture from wobbling permanently without having to take them completely apart? Are there specific reinforcements, tips on screws, brackets, or perhaps special additional parts that have proven effective? I would appreciate any suggestions that help keep the furniture stable and secure in the long term.