Smudge/Blemish on my BMPCC 6k won’t go away after cleaning

Hi, I’ve had my camera for about over a year now and haven’t had any problems but recently I noticed a dust/blemish on my screen and on my clips after post production. I realized that I may need to professionally clean my sensor properly so I ordered the right materials and gently cleaned it. However even after cleaning it there still seems to be the same blemish on my screen. When you look at it it seems as though it’s underneath the glass and I suspect it could be on the other side of the IR filter (I hope there is no probability that it could be a deeper issue than that). I really need some advice on whether it means I should replace my IR filter with a better one or just have someone professionally clean the filter or something.

I’ve heard some people choose to buy a better IR filter called the RAWLITE filter which prevents these blemishes from happening. Anything helps please let me know!

To really inspect, put on a pinhole... everything will show.

That said, if there is only what you could consider "minor" dust or smudges and these are on the inside of the filter or on the sensor... it may be a better solution to treat the speck as a dead pixel and use that repair tool in Resolve. Since the speck will likely remain in place, a repair node could be made to just drop in when ever that camera is used. I have used the Dead Pixel Remover tool to remove dozens of such spots when shooting with a pinhole. Of course, pinhole images being much softer can have many such repairs without them being noticed. But this might be a solution for what you would consider "minor".