My acer aspire 7 a715-75G keyboard keys are stopping one by one

Hello. I have acer aspire 7 a715-75G. I bought it 2 years ago. Last month FN key in keyboard started to lag. I needed to press it 3 times to work. It kept getting worse. After some days i had to press FN+ALT+F4 like 10 times to close anything. I tested the key at a keyboard tester. It worked once-twice every 10 clicks. Anyway the key completely stop after some days of that. I didnt care tbh. FN is not that important. Anyway last week i was playing. I should hold Q to do something. But Q sometimes didnt hold. When i hold it it just dont hold ( tested it in google search too. Kept holding the key and stopping for 1 min. And yeah the key sometimes didnt hold. ). I ignored that. 2 days ago the key started to lag. Didnt lag too much. I was playing It lagged 3 times in a 1 hour game. I removed the key and cleaned it. I hoped that this will fix the problem but yesterday i was playing. While playing Q key was working normally then it suddenly COMPLETELY stopped working for like 1 min and then it worked again BUT its lagging became worse since then. I played 1 game for 30 min today. It lagged 6 times in it ! Why my keybaord keys are dying one by one ! What should i do ? The laptop it not old at all. And i dont smash the keyboard or anything like that. How can i save my Q key !

[Edited the thread to add model name to the title]