I see riders all the time put their helmet on cool but precarious spots on the bike. I have tried these “cool” spots and dropped my helmet to the ground every time. Drop your helmet, get a new one.
I found this one spot where the helmet works best for me. I put it on the passenger foot peg on the drivers side and lock it with a cheap bicycle lock to prevent it from blowing off. That way, if it does drop from this height, it won’t get damaged or compromised. If you drop your helmet from waist height or higher, on a hard surface, I would say the strength has been compromised and suggest getting a new helmet. Helmets today are almost disposable. Only good for one drop. But that’s all you need it for.