The spit test is unreliable.
You can read this on this forum (use the search function at the upper right of each page). There’s also independent confirmation of the unreliability of the spit test.
If you really have candida, you can never “cure” it completely. Everyone has candida: it’s on your skin, in your nose and mouth, in your esophagus, in your intestines – it’s almost everywhere, and that is a normal condition.
The only problem is that some people have too much candida. Due to some imbalance, candida overgrows, and then there’s way more candida and possibly too few other bacteria (because the candida took their place). In other words, if you have a candida problem, it’s not the fact that you have candida that’s the problem, it’s the overgrowth of candida that’s problematic.