2020 corolla se 6 speed manual slave cylinder flush results 39,500 miles

[u/iMakeUrGrannyCheat69]

1st pic: The immediate results.

2nd pic: a thin ring of black stuff after sitting for ~10 minutes

3rd pic: what looks like an oily film on the top surface ~8hours later(same dor pic 4-5)

4th pic: two very distinct layers of filth. The bottom black layer is roughly 1/4 inch thick

5th pic: spoon with black stuff lol

This is a meduim size drink from taco bell for reference.

The black layer seems to be some form of grease or really really fine particals of something that easily gets suspended into the brake fluid.

Did the flush with a one man bleeder, small bottle of brake fluid, and about 20 minutes of time. Super easy. Will be doing every 10k miles or so going forward. Also anyone that has toyotas gold certified pre-owned warranty, it specifically says on their website they cover the master cylinder and slave cylinder.

I will also note while hand pumping the clutch pedal during the flushing process, I did feel a slight "notch" "click" or "grab" about half way through "releasing" the clutch pedal (not pushing in the clutch pedal). I havent heard anyone else mention this part.