I deliberately do not use ink monitor, I do regular visual check this does three things, first regular maintenance check and second ink agitation and third ink level. With see in carts that is as simple as lifting the ink compartment cover.
Next and MOST important. Cone pigment Ink for the 3880 is encapsulated, that is each pigment particle is encapsulated in a material that gives it a regular shape and isolates it from the next particle. This is a critical part of the formulation and technology associated with Cones' ink.
Raw pigment is irregular in shape and has sharp edges. As a result of that it is prone to being abrasive regardless of the suspension material and is also super prone to packing tightly with its companions when it settles, it takes very little for these irregular particles to pack together into an unbreakable clump. these clumps can and do also pack together and form a mass large enough to block a nozzle.
Cones encapsulation prevents that by having a regular shape and so the particles can move freely past each other without getting hung up and drawn into a clump.
Finally raw pigment is abrasive, much like sandblasting, from the very first charge of raw pigment you are eroding and damaging each nozzle (regardless of brand of printer, its just a physical law)...suggestions that the suspension material prevents this is at best BS, where and how that damage takes place also drives how easy it is for un-encapsulated particles to hang ( much like a tooth cavity). These hung raw particles then act to trap other passing particles and can, and do dry out and cause immovable micro structures that eventually also lead to blockage.
So check if the ink you a purchasing is encapsulated, if it is not you are damaging your print head....FULL STOP!! Please feel free to go tell the Marines otherwise, or ask a fluid dynamics engineer from the chemical industry.
The predisposition of denser pigment lode in some colours to clump (in situations of out and out neglect) is the very reason I gave away mechanical/ electronic ink level monitoring in the first place......an ounce prevention is worth a thousand pounds of maintenance replacement in time, effort and cost.