No milk is coming out. What can I do? 22 November 2019 12:47 Updated Check that the pump is assembled correctly according to the instructions. Refer to the useful tips in the user manual. See breast pump user manual (pdf) > Related articles My milk production is low/reduced. How is this possible? The milk is foaming when expressing. Why is that? How do I clean the breast pump? Do Difrax products contain melamine? The suction on the pump is too low. How do I fix this?