Small black to grey bug similar to Lepisma saccharina

[stefzdra]

Hello! I am trying to identify a small bug I found at home in Poland, Europe.
it is similar to Lepisma saccharina, but wider and the colors are a little bit diferrent.
it is near to 2 Sciaridae (?) - the flies that grow in flowerpot with soil, on the photo for the size comparison.

I believe the front is on the left side.

it has a lighter belly (upside down).

It is the first time I see that bug at my home.

I did not find anything similar after looking at many different cockroaches' nymphs at google images. it has too long legs and different colors.

At my home I have very dry air. Below 40% of humidify.

I really tried to make a sharp photo but this is the best I made.

Can anyone give me any hint what should I google for? Or maybe someone has a 100% guess?

[desertrat]

It could be a Gray Silverfish, Ctenolepisma longicaudata, that has recently been found in Poland. They go through gradual metamorphosis which means they hatch from the egg and look like a miniature version of the adult. It does look like a silverfish/firebrat but the size compared to the fungus gnats would mean it's not full grown.

Here's some links that might help.

www.pestcontrolnews.com/the-grey-silverfish-paperfish-now-confirmed-in-poland-as-well-as-the-uk/

www.google.com/search?q=Ctenolepisma+longicaudata&sxsrf=ACYBGNTqX_24Uviqs5Pa_RLplaih9N1CRA:1578366921161&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjZuKT9wvDmAhUBj54KHXK3B94Q_AUoAXoECBIQAw&biw=1745&bih=807&dpr=1.1#imgrc=eAvN8VixUuq-oM:

[stefzdra]

This is the thing. It is wider and more oval and  shorter than any insect with hairs at the end I found. It does not look like anything I found online including grey silverfish.
since the silverfish' nymphs look like a miniature adult, the adult of this insect would also be oval.