Deity worship means to be very, very clean. You should try to bathe twice daily. The Deities should never be approached without having bathed first and changed to clean cloths after passing stool, etc. Keep teeth brushed after each meal, fingernails clean and trim. Be sure that your hands are clean before touching anything on the altar or the Deities. And cleanse the Deity room, altar and floor daily thoroughly. Shine the various Aratrik paraphernalia after Aratrik. This is described in the booklet for pujaris written by Silavati Dasi. The idea is summit cleanliness - that will satisfy Krsna.
Letter to Rukmini, 20 March, 1970