Current and former employees told ProPublica that they have seen the plant in Sturgis, Michigan, take shortcuts when cleaning manufacturing equipment and testing for microbes. The employees said leaks in the factory are sometimes not fixed, a dangerous problem that can promote bacterial growth. They also said workers at the facility do not always take required swabs to check for pathogens while performing maintenance during production. Supervisors have urged workers to increase production and have retaliated against workers who complained about problems, the employees said.

One worker complained to the Food and Drug Administration in February, saying the plant has experienced “persistent leaks” and “unaddressed contamination issues,” according to correspondence between the worker and the agency viewed by ProPublica. Water and chemicals have pooled on the floor, the worker said. In one spot, white sweetener oozed from a pipe and formed a pile like a stalagmite on top of a tank used for blending, the employee said.

The complaints come as the Trump administration is dismantling wide swaths of the federal government — including conducting mass layoffs at the FDA — and filling some key regulatory positions with industry-friendly voices. The new head of the FDA division that oversees baby formula is a corporate lawyer who previously defended Abbott against a lawsuit.