For
a plant polish, use milk or water and castille soap mixed together
(can put in a spray bottle).
To
kill plant pests, put a whole clove of garlic in the pot at the
base of the plant. This usually deters them.
To
kill insects on your houseplants, spray them (the insects) with
a mixture of rubbing alcohol and water (1:1 ratio). Do not use on
food plants, ferns or leaves that are fuzzy/hairy.