Greetings, everyone! I recently bought a 2019 Toyota Etios sedan. For those of you who don't know it: it's basically a budget Toyota Yaris sold in some countries, such as mine (I'm from Brazil, but I can speak English just fine). It's got a little over 10,000 miles. It has a 1.5L 2NR-FBE engine and a 4-speed automatic transmission, like the one in 2000s Corollas. According to the scheduled maintenance sheet on the owner's manual, it's time to check the brake fluid. I opened the cap on the brake master cylinder, but it turns out there's a screen at the top. I have a brake fluid tester (it's one of those testers that look like pens), but this screen won't let me dip the tester in the fluid. I tried to rotate the screen around the thread with my fingers, but it didn't move up. It just keeps rotating endlessly. Mind you, the car was cold when I tried this. How am I supposed to remove it so I can get to the fluid itself? The manual says brake fluid should be first changed at 5 years or 30,000 miles, regardless of condition. Should I just drive it to the shop and have the brakes bled and the fluid changed? Or can I keep on going a couple of years more, provided the fluid is in good condition?

That's it, as far as my question goes. I speak English, so I can talk to you without relying on Google or whatever. Don't hesitate to ask for more details!

For those of you who are curious and have the time to read this: I'm in love with this car. My previous car was a 2003 Corolla with the legendary 1.8L 1ZZ-FE engine and the 4-speed automatic transmission (identical to Scotty's Matrix). It ran on gasoline only. The Etios gets much better gas mileage with almost the same performance as the old Corolla. The ride is quite rough, I admit, but that's basically the only thing going against it. I've been running it on E100. Yes, that's full ethanol (95% ethanol and 5% water, actually). Most cars in Brazil are designed to be able to run on pure ethanol/gasoline. Well, I went on a small trip the other day. I was driving mostly at 55-65 mph, on the highway, and guess what? I got 31 mpg on full ethanol. That's amazing! The price of ethanol is about 65% the price of gasoline where I live, so it actually makes sense to run on ethanol. It can save me some money in the long run, since I get anywhere from 65% to 75% of the mileage I'd get with gasoline (depending on speed, traffic, and such).

Thanks!