Omni has same quality as Akari, Firefly, America etc. if you want safer brands go for GE, Toshiba, Osram and Philips.

Is your wash area humid or has steam inside the room sometimes? if so, the electronic internals of the bulb might have been damp, this could cause a short in the small circuit board inside.

Omni and Akari provide at least a year warranty on their bulbs, maybe you can still avail of a replacement, if you want.