pivoted to its normal closed position the outer periphery of the wiping element 115 will cut into any significant clot of moistened detergent adhering to the seat 8 at the terminal edge thereof the seat 8 is thus wiped clean of such moistened detergent after each dispensing operation at which time the lid 9 is brought back to its normal position over the metering chamber 7 and the wiping element 115 is inserted into the seat to come to rest on the first annular surface of the stepped portion 118 the wiping element will become more effective with increases in the force by which the lid 9 is moved to the normal closed position thereof therefore according to another feature of the second embodiment of the present invention means are taken to move the lid 9 onto the seat 8 with a great amount of force particularly during the final phase of the movement thereof in which the wiping element is required to cut into any moistened detergent adhering to the seat 8 specifically one or more permanent magnets 119 are provided in the dispenser preferably adjacent the end of the metering chamber 7 as shown in fig1 magnetic element s 120 are mounted to the lid 9 at a position thereon which will place the magnetic element s adjacent the magnet s 119 when the lid 9 is closed that is as the lid 9 is pivoted closed the magnetic element s 120 approaches the magnet s 119 whereby the mutual attraction of.