It is important to discuss the safety of all ingredients in household products which may cause contact allergy but it is also important to have an evidence based rational debate. The authors study the risk of MI (methylisothiazolinone) in laundry detergents for household machine washing. The objective of the study is clear and the discussion interpretations and conclusions justified by the results of the study. They stated that that the use of MI in laundry detergents is safe for the consumer if these products are used according to the instructions in a normal household setting machine wash as MI is not detected in washed clothes.