A method for manufacturing a water-soluble laundry detergent sheet, the method comprising, consisting essentially of or consisting of the steps: (i) providing an aqueous liquid, preferably homogenous, composition comprising, consisting essentially of or consisting of the following components: (a) at least one soil release polymer, (b) at least one surfactant, (c) at least one water-soluble polymer, (d) at least one washing booster, (e) optionally at least one perfume component, and (f) optionally at least one adjunct detergent ingredient; (ii) applying the composition of step (i) onto a surface such that it forms a layer on said surface; (iii) drying said layer to obtain a laundry detergent sheet; and (iv) optionally cutting the laundry detergent sheet into pieces of a desired shape and size; and (v) optionally packaging one or more laundry detergent sheets obtained in step (iv), wherein the at least one washing booster comprises at least one polyalkyleneimine, preferably polyethyleneimine or alkoxylated variant thereof, preferably contained in the composition in amounts of from 0.01 to 40 wt.-%, more preferably in amounts of from 0.1 to 30 wt.-%, based on the total weight of the composition, and wherein the liquid composition of step (i) has a viscosity of 50 to 100,000 mPas at 20 °C, more preferably of 1,000 to 50,000 mPas at 20 °C, measured with a Brookfield viscometer (Brookfield DI-I Prime, spindle 3, 10 rpm), wherein the method is a continuous manufacturing process. (i) providing an aqueous liquid, preferably homogenous, composition comprising, consisting essentially of or consisting of the following components: (a) at least one soil release polymer, (b) at least one surfactant, (c) at least one water-soluble polymer, (d) at least one washing booster, (e) optionally at least one perfume component, and (f) optionally at least one adjunct detergent ingredient; (a) at least one soil release polymer, (b) at least one surfactant, (c) at least one water-soluble polymer, (d) at least one washing booster, (e) optionally at least one perfume component, and (f) optionally at least one adjunct detergent ingredient; (ii) applying the composition of step (i) onto a surface such that it forms a layer on said surface; (iii) drying said layer to obtain a laundry detergent sheet; and (iv) optionally cutting the laundry detergent sheet into pieces of a desired shape and size; and (v) optionally packaging one or more laundry detergent sheets obtained in step (iv), wherein the at least one washing booster comprises at least one polyalkyleneimine, preferably polyethyleneimine or alkoxylated variant thereof, preferably contained in the composition in amounts of from 0.01 to 40 wt.-%, more preferably in amounts of from 0.1 to 30 wt.-%, based on the total weight of the composition, and wherein the liquid composition of step (i) has a viscosity of 50 to 100,000 mPas at 20 °C, more preferably of 1,000 to 50,000 mPas at 20 °C, measured with a Brookfield viscometer (Brookfield DI-I Prime, spindle 3, 10 rpm), wherein the method is a continuous manufacturing process. wherein the at least one washing booster comprises at least one polyalkyleneimine, preferably polyethyleneimine or alkoxylated variant thereof, preferably contained in the composition in amounts of from 0.01 to 40 wt.-%, more preferably in amounts of from 0.1 to 30 wt.-%, based on the total weight of the composition, and wherein the liquid composition of step (i) has a viscosity of 50 to 100,000 mPas at 20 °C, more preferably of 1,000 to 50,000 mPas at 20 °C, measured with a Brookfield viscometer (Brookfield DI-I Prime, spindle 3, 10 rpm), wherein the method is a continuous manufacturing process.