Method for counteracting ammonia malodor comprising: a) carrying out with at least 3 panelists a panel evaluation of the lateralization threshold of ammonia in the presence and in the absence of a perfumery raw material, wherein in a first stage the panelists are presented with pairs of glass bottles equipped with nose pieces, one of these bottles containing ammonia, wherein in each pair of glasses ammonia is present in different concentrations, wherein each bottle is applied to one nostril using the nosepiece, wherein the panelists are asked to identify in each pair which bottle contains ammonia, and wherein the ammonia lateralization threshold is the lowest level at which the presence of ammonia can be identified correctly; and comparing in a second stage both lateralization thresholds, wherein the lateralization threshold of ammonia is evaluated when it is combined with the perfumery raw material using the same method as for ammonia alone, wherein the perfumery raw material is used in a potency matching a reference of 170 ppm allyl heptanoate in propylene glycol; b) identifying perfumery raw materials which elevate the ammonia lateralization threshold, further referred to as Elevating perfumery raw materials, by at least 20%, as judged by at least 60% of the panelists participating in the evaluation of step a), and identifying perfumery raw materials which lower the ammonia lateralization threshold, further referred to as Lowering perfumery raw materials, by at least 20%, as judged by at least 60% of the panelists participating in the evaluation of step a); c) creating a perfume comprising at least 30% by weight, relative to the total weight of the perfume, of one or more Elevating perfumery raw materials as identified in step b), and at most 20% of Lowering perfumery raw materials relative to the total weight of the perfume; d) incorporating the perfume created in step c) into a consumer product base comprising ammonia, or into products where ammonia is released by the decomposition of urea in urine. a) carrying out with at least 3 panelists a panel evaluation of the lateralization threshold of ammonia in the presence and in the absence of a perfumery raw material, wherein in a first stage the panelists are presented with pairs of glass bottles equipped with nose pieces, one of these bottles containing ammonia, wherein in each pair of glasses ammonia is present in different concentrations, wherein each bottle is applied to one nostril using the nosepiece, wherein the panelists are asked to identify in each pair which bottle contains ammonia, and wherein the ammonia lateralization threshold is the lowest level at which the presence of ammonia can be identified correctly; and comparing in a second stage both lateralization thresholds, wherein the lateralization threshold of ammonia is evaluated when it is combined with the perfumery raw material using the same method as for ammonia alone, wherein the perfumery raw material is used in a potency matching a reference of 170 ppm allyl heptanoate in propylene glycol; b) identifying perfumery raw materials which elevate the ammonia lateralization threshold, further referred to as Elevating perfumery raw materials, by at least 20%, as judged by at least 60% of the panelists participating in the evaluation of step a), and identifying perfumery raw materials which lower the ammonia lateralization threshold, further referred to as Lowering perfumery raw materials, by at least 20%, as judged by at least 60% of the panelists participating in the evaluation of step a); c) creating a perfume comprising at least 30% by weight, relative to the total weight of the perfume, of one or more Elevating perfumery raw materials as identified in step b), and at most 20% of Lowering perfumery raw materials relative to the total weight of the perfume; d) incorporating the perfume created in step c) into a consumer product base comprising ammonia, or into products where ammonia is released by the decomposition of urea in urine.