Good evening community, the problem I present is the following, refill a batch of 10 toner cartridges compatible 78A of which 4 of them, after refilling them and placing the magnetic roller, turn manually and in this it began to accumulate toner in one of the edges, and the more it turns, the more it accumulates, it was tested by changing the metering blade for a new one, but the fault is still present in all the cartridges that presented this problem after refilling, the dust that I use it's good quality. But I don't know what can cause this problem. Thank you for your cooperation.