u/Czesix6

I found an old łucznik 1303 at my attic, it was working well for 2 weeks then it stopped working. The typewriter is stuck on the backspace key, space doesn't work. I opened it up and sprayed some wd-40 after blowing it with compresed air. It still doesn't work, please help me, beacuse it's polish product I couldn't found any tutorials