Also in 2010, workers in China planned to sue iPhone contractors over poisoning by a cleaner used to clean LCD screens. One worker claimed that he and his coworkers had not been informed of possible occupational illnesses.[314] After a high suicide rate in a Foxconn facility in China making iPads and iPhones, albeit a lower rate than that of China as a whole,[315] workers were forced to sign a legally binding document guaranteeing that they would not kill themselves.[316] Workers in factories producing Apple products have also been exposed to n-hexane, a neurotoxin that is a cheaper alternative than alcohol for cleaning the products.[317][318][319]