Forgot to mention something, oops!
When cutting without abrasive, please disconnect the abrasive hose from the cutting head. To be frank, I only plug the abrasive hose into the cutting head when I am ready to cut a material that requires abrasive. Leaving the hose disconnected from the cutting head will prevent any water/clogs forming in the hose.
P.S. A user has shared a custom made 3D printed abrasive hose holder, so the hose does not simply dangle in the tank during troubleshooting or cutting without abrasive. Check it out! (Link)