a method to continuously clean a fouled process stream using a magnetic field comprising feeding the fouled process stream , comprising a fouling constituent , to a magnetic separation unit . the magnetic separation unit comprising a separation vessel configured to receive the fouled process stream , a mounted magnet configured to generate the magnetic field operable to reduce a concentration of the fouling constituent . the mounted magnet comprising a magnet motor configured to rotate a shaft , the shaft configured to rotate a magnet , and the magnet configured to generate the magnetic field . a circulation pump fluidly connected to the separation vessel and a sampling point configured to allow removal of a sample . the method further includes measuring the concentration of the fouling constituent in the sample and supplying an effluent stream from the separation vessel to a clean collection vessel .