A liquid laundry detergent formulation is provided, comprising: a liquid carrier; a cleaning surfactant; and a cleaning booster, wherein the cleaning booster is of formula (I)




wherein R1 is a C1-4 alkylidene group; wherein each occurrence of R2 is independently selected from a C2-5 alkylene oxide group; and wherein the sum v+x+y+z is 4 to 1,600.