DTG HM-1 problem! Help!

firefightersteve7

I am new to the DTG process. I recently bought a used DTG HM-1. It works great, but the white ink chip goes out after just a couple of days. This is driving me crazy and I do not know why it is doing this. The other ink chips have no problem, in fact I have not even replaced them yet. It is just the white ink chip I am having trouble with. Any help in this matter or what I need to replace would be greatly appreciated.
Steve Crum

smason

we are having the same problem on m2 they say replace the head we did 5 day later went out. this is crazy