Extremely soft water can make rinsing all of the soap off of equipment difficult. My water in Oregon approaches the distilled level & I had to change my cleaning methods.
But, both apple & soap can be from the yeast.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk