Maybe you can give another few more days and if no sign of live inside the egg, you can remove it.. you actually can try to 'candle' the egg by looking below the light bulb... if there are some 'half blank' inside the egg, it is because the yolk inside the egg have dry up and you can throw the egg away..

[/s: Don't worry, you can try next season.

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Best regards,
Tanin Eh Boon
Malaysia Bird Community