A liquid washing or cleaning agent, containing (i) a liquid phase containing at least one surfactant and water, and (ii) in the liquid phase, suspended solid particles having an average particle diameter X 50.3, volume average, of from 0.01 mm to 3 mm, containing, based on the weight of the solid particles, a total amount of from 30 to 100 wt.%, preferably 50 to 100 wt.%, particularly preferably 75 to 100 wt.%, of at least of one anionic polyester, containing at least one structural unit of formula and at least one structural unit of formula and at least one structural unit of formula, where a, b and c each represent, independently of one another, a number from 1 to 200, R 1, R 2, R 5 and R 6 each represent, independently of one another, hydrogen or a C 1 -C 18 n-alkyl group or C 3 -C 18 iso-alkyl group, 1/n M n+ represents an equivalent of a cation having the charge number n, where n = 1, 2 or 3, R 3 and R 4 each represent, independently of one another, hydrogen or a C 1 -C 18 n-alkyl group or C 3 -C 18 iso-alkyl group, R 7 represents a linear or branched C 1 -C 30 alkyl group or a linear or branched C 2 -C 30 alkenyl group, a cycloalkyl group having 5 to 9 carbon atoms, a C 6 -C 30 aryl group or a C 6 -C 30 arylalkyl group, * represents a free valence of the structural element concerned, which valence forms an ester bond in the polymer backbone of the polyester, with the proviso that the average particle diameter X 50.3 is measured before the incorporation into the liquid phase of the agent after storing the solid particles in the climatic chamber for 24 hours at 30 °C and 50% relative humidity. (i) a liquid phase containing at least one surfactant and water, and (ii) in the liquid phase, suspended solid particles having an average particle diameter X 50.3, volume average, of from 0.01 mm to 3 mm, containing, based on the weight of the solid particles, a total amount of from 30 to 100 wt.%, preferably 50 to 100 wt.%, particularly preferably 75 to 100 wt.%, of at least of one anionic polyester, containing at least one structural unit of formula and at least one structural unit of formula and at least one structural unit of formula, where a, b and c each represent, independently of one another, a number from 1 to 200, R 1, R 2, R 5 and R 6 each represent, independently of one another, hydrogen or a C 1 -C 18 n-alkyl group or C 3 -C 18 iso-alkyl group, 1/n M n+ represents an equivalent of a cation having the charge number n, where n = 1, 2 or 3, R 3 and R 4 each represent, independently of one another, hydrogen or a C 1 -C 18 n-alkyl group or C 3 -C 18 iso-alkyl group, R 7 represents a linear or branched C 1 -C 30 alkyl group or a linear or branched C 2 -C 30 alkenyl group, a cycloalkyl group having 5 to 9 carbon atoms, a C 6 -C 30 aryl group or a C 6 -C 30 arylalkyl group, * represents a free valence of the structural element concerned, which valence forms an ester bond in the polymer backbone of the polyester, with the proviso that the average particle diameter X 50.3 is measured before the incorporation into the liquid phase of the agent after storing the solid particles in the climatic chamber for 24 hours at 30 °C and 50% relative humidity. a, b and c each represent, independently of one another, a number from 1 to 200, R 1, R 2, R 5 and R 6 each represent, independently of one another, hydrogen or a C 1 -C 18 n-alkyl group or C 3 -C 18 iso-alkyl group, 1/n M n+ represents an equivalent of a cation having the charge number n, where n = 1, 2 or 3, R 3 and R 4 each represent, independently of one another, hydrogen or a C 1 -C 18 n-alkyl group or C 3 -C 18 iso-alkyl group, R 7 represents a linear or branched C 1 -C 30 alkyl group or a linear or branched C 2 -C 30 alkenyl group, a cycloalkyl group having 5 to 9 carbon atoms, a C 6 -C 30 aryl group or a C 6 -C 30 arylalkyl group, * represents a free valence of the structural element concerned, which valence forms an ester bond in the polymer backbone of the polyester, with the proviso that the average particle diameter X 50.3 is measured before the incorporation into the liquid phase of the agent after storing the solid particles in the climatic chamber for 24 hours at 30 °C and 50% relative humidity.