ᐅ KALLAX shelves worn out after several assemblies – how to reinforce them?

Hello everyone,

I have an IKEA KALLAX shelf unit that I have assembled and disassembled several times, which has caused the joints to become quite worn in several places. My problem now is that the shelf has become noticeably unstable and wobbles slightly in some areas. I want to avoid buying a completely new piece of furniture since it is very practical and the size fits perfectly.

My question is: What options are there to effectively and permanently stabilize a KALLAX shelf unit that has worn screw connections and dowel holes from repeated assembly and disassembly? Are there any special tools, reinforcement materials, or specific techniques that have proven effective without having to essentially rebuild the whole shelf?

I would also appreciate any tips on replacement parts or tricks specifically suited for the connection points. Thanks in advance!