Have lost my Airpods

Hi everyone/anyone,

Last night i lost my airpods and i have been trying to find them but had no luck. I jave tried to use the "find my iPhone" to find them but because they are not connected to a device, they won't ping. It won't even show me a last location where they were in use.

Has anyone got any advice on how to give me a better chance in finding them, or should i accept they are gone for good? :(

Thank you.