When building his house, my father took many shortcuts and often picked the cheaper option, even if it would be more costly in the long term. And even when a cheap piece of crap breaks becuse it's a cheap piece of crap, he goes and buys another cheap piece of crap to replace it.

For example, he refuses to connect to the city water supply, instead he built a well. This can be a good way to save on water costs, as long as your regularly replace filters and test the water to make sure it's safe, and descale it if too hard.

However, he rarely replaces the filters and refuses to install a water softening system. We got sick a few times because of the water (now we just buy bottled when visiting), and all appliances, faucets, water heater are clogged with limescale that cause low water pressure. Fixing or replacing all of them is going to be super expensive.

Similarly, he bought the cheapest doors, and we got stuck because the door handle broke. The house is full of improvised electric stuff. The fridge is so bad it regularly breaks, and even when it's working sometimes food spoils after just 1-2 days because it doesn't cool evenly. He is also a bit of a hoarder, and has a terrible taste in furniture and decorations.

I am the most likely to inherit the estate, and I'm honestly not looking forward to having to deal with all that crap.

I think the gel thing is a portion of humanity (especially those who need a cpap) and if you don’t have one and you are getting dry mouth you should really look into a sleep test to make sure you’re not on the brink of death every hour as you sleep

Either that or get your nose checked as maybe there’s an issue there that is causing mouth breathing.

Thank your lucky stars you've never had to descale a toilet...

Read the manual. It might have a descale mode that pushes some descaling chemical through the pipes without heating it.

Source: I did it like a month ago. The water that came out was quite pulpy.

White vinegar works, or you can pick up "sour salt" in the Kosher section, which is citric acid and since you don't need much the rest is handy as a substitute for lemon juice. Dilute with plenty of water, run the machine, it removes calcium deposits.

I usually just run vinegar through it every once in a while and then run a few pots of just water to get rid of any residual vinegar. Beware, it'll make the house smell like vinegar for the rest of the day.