Hey there! In Version .25, i've turned down disliked food from being +2 to +1 suspicion. In the earlier versions, I realized that it was basically impossible to max suspicion. I may have overtuned it a bit too much. I also have a pop up now that shows whenever suspicion increases, so you aren't caught off guard if a housemate reaches max.
Suspicion also drops by 1 overnight if the housemate isn't at max, so it will go down by itself over time!