Ps4 is not making a proper connection with the ps4 controller?

It's hard to explain and so I couldn't find anything on the internet

Recently my brother opened my Playstation 4 to remove all the dust and dirt that had accumulated in there, because sometimes the message came that it was overheated.

After it was finished and it was cleaned, the message that it was overheated didn't come up, but somehow my ps4 no longer established a proper connection to the controller…

Before I could use the controller ink. Headset leave the room and go to the toilet next to it or on the balcony while listening to Spotify on the ps4 or in the game and meanwhile moving in the game and listening to the game sound

Now it is so that I can't even sit 1 meter away from the console while playing or listening to music

Because otherwise the controller goes off or the connection is simply disrupted, as should I say (no more game sound in the headset or music disappears / pressing buttons on the controller shows a delay or no reaction)

I hope you understood where the problem is

That was definitely not before and now I'm wondering if someone has any idea why that could be or what you can do there?

I thank you for any help and answer ^^

Look at this

Could it be that the PS4 controller is now running out of steam (which I don't think so much) or what is more likely that something was damaged while cleaning, a contact was broken off, there's now a loose contact or something similar.

So from minute 5. You have to buy a PS4 Wi-Fi antenna on Ebay. It costs 5 euro and you build it in like in the video.