Too late! RUN!!!!
But, yes, you should source a different cartridge set and see if they work better for you.
Something in your cleaning box is causing the ink to wick. That you are getting blobs indicates that you may be over-foaming inside the box, but this too may just be the excess fluid being wicked from the carts. This normally drains but it is possible your pad is too close and contacting, or its just not draining. IN any event - an OEM cart has a micro channel vent coupled with an internal valve. Both are patent protected and prevented by an ITC-337 from being imported into the USA. So no 3rd party carts in USA since 2007 with those features. That ours work in most our customers printers does not make the design defective. You just need a set with less aggressive venting for your particular clean box.
If you get a new set and you still have the same issues - then you might want to try and modify your clean box height by removing it, shaving a very small amount off the mounts to lower, bit by bit. But I would first remove the drain tube and make sure nothing like sludge build up is in there causing it to drain slowly.
Try and buy a set of carts that have the micro-valve. They are usually gray opaque and look exactly like the OEM! Then mail us a set. We can't import but we can accept gifts!