There is truly one thing that makes a significant difference for your loved one and that is water.  I always know when my loved one hasn’t had enough water as the next day they will not be well.  Elderly people are not fond of drinking a lot of water, so it’s your job and my job to help them drink enough.  It is night and day different.  If my loved one doesn’t get enough water, I know that it will be a bad day the next day.  And that affects everyone.

So water, water, water.  Not tea, coffee, soda, whatever.  Have them sip water continuously.