How to get rid of false key presses?

Question

Keyboard

Hello!
I often work sitting on the couch, while the picture goes to TV. I have an inexpensive Genius 8000ME keyboard, everything suits me, except for one bug.
When I press the up button, I insert a dot. Pressing the button to the left inserts a dash. That is, navigation through the editor turns into hell. In addition to everything, Backspace is sometimes added.
From where I sit to the very radio module: 2 meters + -. There are basically no obstacles, except for a coffee table (plywood).
Bug that is, then no, that is. if the keyboard is slightly tilted or shaken, then everything is eliminated, even at distances longer than two meters. I tried washing / cleaning the keyboard, just like changing batteries.
Is it possible to get rid of this problem without buying a new keyboard? What is the problem? Along the way, a Bluetooth keychain works to synchronize with the clock, the apartment has Wi-Fi.
Here's what it looks like in the editor, note the row of dots - I just moved up through the code with the up arrow on the keyboard.