The invention relates to a antimicrobial and cleansing composition consisting of a. a polymeric biguanide, and b. a metal ion chelating agent, and g. a solvent, wherein the ratio of a:b is between 0.75:2.25 and 1.25:2.25, or about 1:2, and optionally one or more of the following ingredients; c. a quaternary ammonium salt, d. at least one surfactant, e. a humectant and f. a gelling agent. The invention further relates to said composition for use in a treatment, prevention or reduction of a disease, disorder or condition related to microbials, or treatment, prevention or reduction of infection, or inflammation, or infected wounds, or inflamed wounds, or treatment, prevention or reduction of biofilms, or removal of necrotic tissue. A liquid flow system may be used for administration of the composition.