It’s time for Rubi’s brakes to get some attention; specifically the BRAKE FLUID! What can happen is that over time water can build up in the brake fluid itself. The only way to remove the water is to replace the brake fluid. A flush of the system is required periodically.
Given that Rubi is nearly 11 years old, a flush is WAY over-due! Since I do most of my work solo, the One-Man Bleeder Kit came in really handy!
One-Man Bleeder Kit: https://www.canadiantire.ca/en/pdp/oemtools-bleed-o-matic-brake-bleeder-kit-0250131p.html#plp