Smoke alarms are supposed.to be replaced every ~10 years. If it's changed colors you need a new one.
Drop ceilings can also cause this. If the entryway to your kitchen has a dip down then it keeps all the smoke and moisture.in the kitchen rAther than dissipating.
Either move the detector to the other side of the dip or buy a new one and it'll let you get a few more years off one super sensitive like that.
Clean them with canned air spray, a vacuum, or electric duster as well. Dirt already trapped inside can make it already sensitive.