lately my first octave key won't go up immediatly, si there a way to clean it, or make it more likely to open?

Check the octave key spring. Make sure it's not broken, bent, & that it's in proper position.

You could try bringing ur oboe to a reliable repairman...

If it's just sticky, you can just slide a dollar bill under it, press down the key, and slide the bill out. You might want to do it a couple times. If it still sticks, it might be a problem with the pad (pads are cheap to replace) or it could be that a screw is too tight (but don't mess with the screws yourself; get a pro to do it).