My husband was diagnosed with MCI in 2012, his decline was slow for the first 8 years, but he has rapidly gone downhill since then.

Trying to manage his moods and difficultness is certainly a challenge. I work hard to keep our days calm and, on a routine, although his agitation can rise from nowhere. Especially late afternoon when he’s tired and not my best time of day either.
I try to keep a smile on my face and a happy tone in my voice, although I’m not always successful.
When he gets agitated, sometimes I leave the room for a few minutes and come back with a big smile on my face and some distraction or a story. It doesn’t always work and trust me I don’t always feel like it either.