Incubator keeps tripping the bulbs

[Lexbarlow]

Hi, I have campbell duck eggs in my incubator, due for lockdown on 10th on day 25. I went to put more water in tonight and one of the bulbs blew (the light one not the heat bulb). Swapped it for another and that blew a couple mins later.
I've got another in now which seems ok but temp won't go over 36.3. Before it was steady 37.4.

Any ideas what I can do? I saw something about putting foil around to keep heat in but I don't want to cook them! Not ready yet for humidity raise so what are my options.
I don't have a back up incubator so I'm worried ill lose them so close to them being ready

 

[jher77]

Bulbs will last longer if they are not constantly turned off/on.

The first bulb that blew sounds normal, but the second bulb shouldn't have blown that quickly unless it was an old bulb. Was it an old bulb?

The third bulb sounds like it is the wrong wattage. What wattage bulb were you using before and what wattage are you using now? Try a brand new bulb.