The invention relates to a disinfection method for use in cleaning. Characteristic of the invention is that hydrogen peroxide (H 2 O 2) is discharged / passed from one or more containers (16) with liquid pressure which one or more pumps or gravity provides through one or more drain pipes (6) to one or more drainage devices (5). The draining device (5) drains the hydrogen peroxide on one or more evaporative top surfaces (4ea) of an evaporating means (4e) in a heating / heating device (4). Evaporation upper surface (4ea) is at an evaporation angle (4ej) of 1 to 30 degrees with respect to the horizontal plane such that a drain end (4c), adjacent to the drain device (5), is higher than a gas outlet end (4d), opposite the drain device (5 ) in the heating / heating device (4), whereby the hydrogen peroxide spreads due to gravity on the evaporator (4e) where the hydrogen peroxide (H2O2) is converted to hydrogen peroxide gas, with which the hydrogen peroxide gas disinfection is carried out, which hydrogen peroxide gas disinfection is performed. One or more suppressor control valves (24) are used to restrict air from entering a disinfection device frame (1), creating negative pressure within the disinfection device frame (1) when a fan (2) sucks air out of the disinfection device frame (1).Tämän keksinnön kohteena on 1. Desinfiointimenetelmä, käytettäväksi puhdistukseen, tunnettu siitä, että vetyperoksidi (H2O2) valutetaan/siirretään yhdestä tai useammasta säiliöstä (16) yhden tai useamman pumpun tai painovoiman aiheuttamalla nestepaineella yhden tai useamman valutusputken (6) kautta yhdelle tai useammalle valutuslaitteelle (5), joka valutuslaite (5) valuttaa vetyperoksidin yhdelle tai useammalle lämmitys- /kuumennuslaitteen (4) yhdelle tai useammalle haihdutuselimen (4e) haihdutusyläpinnalle (4ea), haihdutusyläpinta (4ea) on 1 — 30 asteen haihdutuskulmassa (4ej) vaakatasoon nähden siten, että valutuslaitteen (5) puoleinen pää valutuspää (4c) on korkeammalla kuin lämmitys- /
