Have the pens been cleaned recently? Are you getting close to the bottom of the bottle?
I was given a free bottle of that when I bought my Diplomat Aero, but I haven't used it yet because I have a 90ml bottle of Noodler's Heart of Darkness to use. I have 2 pigmented inks, & I'm very careful to use them every other day at the least.
@SlowRain Yeah, the pens were well cared for. The bottle was used before, but not a lot and one of the pens was from a cartridge. I've usually not had to be so careful with the ink. I've left it for weeks with no more than a bit of a hard start. It's definitely more sensitive than non pigmented inks, but it's never been to bad. now though, it just wouldn't even start. I don't think it even got in to the feed.
In a decentralised social media it makes sense to host yourself. That's what we decided to do. This instance is run by two nerds, mostly for the why not of it. Feel free to join, and we'll hit you up with an "Hi, who are you?".