A decontamination system suitable for cleaning and disinfecting a medical instrument such as an endoscope, the system comprising: a plurality of pre-clean wipes for wiping an instrument to be decontaminated each pre-clean wipe comprising a moist fabric member in its own sealed container; a two-part disinfectant system comprising: (a) a first part comprising a first reagent in a carrier medium; and (b) a second part which is miscible with the first part and which comprises a second reagent in a carrier medium; wherein the first reagent and the second reagent will react when mixed to provide a disinfecting composition; the first part being contained in a dispenser whereby it will be dispensed as a fluid when the dispenser is actuated, and the second part being absorbed or impregnated in a plurality of disinfecting wipes each of which comprises a fabric member in its own sealed container; and a plurality of rinse wipes, each rinse wipe comprising a moist, sterile, fabric member in its own sealed container; wherein each pre-clean wipe container is provided with a machine-readable Pre-Clean Wipe data carrier which includes data specific to the pre-clean wipe; the dispenser is provided with a machine-readable Dispenser data carrier which includes data specific to the first part; each disinfecting wipe container is provided with a machine-readable Disinfecting Wipe data carrier which includes data specific to the disinfecting wipe; and each rinse wipe container is provided with a machine-readable Rinse Wipe data carrier which includes data specific to the rinse wipe; characterised in that the system further comprises a reader for reading data from said data carriers (36,58,44), and an electronic controller for receiving data from the reader and providing visual and/or audible information to an operator of the system; the controller programmed and adapted to signal an error condition if data carriers (36,58,44,50) are read in an order which does not correspond to a predetermined sequence. a plurality of pre-clean wipes for wiping an instrument to be decontaminated each pre-clean wipe comprising a moist fabric member in its own sealed container; a two-part disinfectant system comprising: (a) a first part comprising a first reagent in a carrier medium; and (b) a second part which is miscible with the first part and which comprises a second reagent in a carrier medium; wherein the first reagent and the second reagent will react when mixed to provide a disinfecting composition; the first part being contained in a dispenser whereby it will be dispensed as a fluid when the dispenser is actuated, and the second part being absorbed or impregnated in a plurality of disinfecting wipes each of which comprises a fabric member in its own sealed container; and (a) a first part comprising a first reagent in a carrier medium; and (b) a second part which is miscible with the first part and which comprises a second reagent in a carrier medium; a plurality of rinse wipes, each rinse wipe comprising a moist, sterile, fabric member in its own sealed container; wherein each pre-clean wipe container is provided with a machine-readable Pre-Clean Wipe data carrier which includes data specific to the pre-clean wipe; the dispenser is provided with a machine-readable Dispenser data carrier which includes data specific to the first part; each disinfecting wipe container is provided with a machine-readable Disinfecting Wipe data carrier which includes data specific to the disinfecting wipe; and each rinse wipe container is provided with a machine-readable Rinse Wipe data carrier which includes data specific to the rinse wipe; characterised in that the system further comprises a reader for reading data from said data carriers (36,58,44), and an electronic controller for receiving data from the reader and providing visual and/or audible information to an operator of the system; the controller programmed and adapted to signal an error condition if data carriers (36,58,44,50) are read in an order which does not correspond to a predetermined sequence.