First, the problem with the ink is that the concentration may be too thick. You can add some thinner! Second, the problem with the glue head may be that the glue head has been used for too long and the viscosity of the glue head is not good for deinking! You can try adding a hair dryer. Third, the printing plate is too dark, change to a slightly lighter printing plate! Fourth, you can add some anti-static agent (generally speaking, Malebao's ST1) to solve the problem!
It is recommended to use high-quality rubber heads and inks to reduce unnecessary waste of man-hours and increase printing output. Don’t underestimate soft costs, they are invisible waste!