Looking for an easy liquid sensor solution.

attached is the state of my generic liquid sensors after 2 days. I have been googling capacitive sensors but most seem to me as difficult to build and get readings from. Has anyome heard of a reliable complete solution to this liquid sensing problem?

I need something that will work in a small size space such as a water glass.

you can use a simple float sensor from a fish tank

in spite of your doubts: learn a bit more about capacitive sensors; they work like inductive sensors but can work with a broad range of materials incl. liquids.