Trying to prevent dehydration. Any tips?

Jello, pudding, popsicles, watermelon, soup, stews, smoothies,
thickeners,

hug!!!

”falls on deaf ears”

we had the same problem.
the solution i suggest:

that the command/suggestion to drink water come from someone she does listen to (for example caregivers/doctors/nurses).

we have hired caregivers. they say “please drink this”, and our LOs drink it.

in our case, also works with phonecall from nurse/doctor/etc.

No suggestions. Just understanding your struggle since my mom is the same way. She drinks much less than she should but does not heed my reminders which are infrequent since they fall on deaf ears.

I would try high water content fruits.

Watermelon, grapes, cantaloupes, honeydews, oranges, etc. All of them make nice frozen treats as well.

One thing that I noticed in the ALs is that the water pitchers sitting out for residents always had some kind of fruit in it. From strawberries to lemon and cucumbers and everything else in season.

Unfortunately dementia can progress to the point that every drink has to be encouraged. I would give her whatever she will drink.

You don't mention natural fruit juices.   They're a good source of liquids.   Stay away from the pop though.  It's  not healthy.

Does she like popsicles? They have some pretty healthy sounding ones out there now made with mostly fruit juice.

Watermelon, cantelope, jello, soup.

Its hard when they don't feel thirsty.