Disinfectant is read as the wish to make something completely safe and free of contamination. Dream books link it to worry about outside influence or to a need for a clean break.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.