The utility model provides a wash aid which comprises a wash aid body and a water tank arranged on the wash aid body. The water tank comprises a water tank base arranged on the wash aid body and further comprises a pressure detection device arranged on the water tank base. The pressure detection device is used for detecting pressure values exerted by the water tank on the water tank base at first preset time intervals. According to the technical scheme, on the one hand, the problems of dry burning and interruption with no warning caused by water tank water shortage can be effectively solved; on the other hand, the using power consumption of the wash aid can be reduced through regular detection, then the service life of the wash aid is prolonged, meanwhile, the using safety of the wash aid is improved, timeliness of prompt early warning is ensured, and user experience is improved.