If you get a situation where the carts work and then ink starvation comes about, you check there is ink in the reservoir but as soon as you remove the refill plug a ton of ink gets pulled into the sponge, you likely are experiencing a situation where the cartridge is choking itself and ink starvation is the result.
Here is a video on how to fix this.
https://youtu.be/tG7JkC1nbQ4
Here is a video on how to fix this.
https://youtu.be/tG7JkC1nbQ4
