Keep an eye out for snow @Magmanovic 

Here's how you can easily spot it or remove it:

Sorry for the mess mate. Anyway i use Gimp to edit photos. I saw the same guide for Gimp so for the next time i hope it will be ok! Thanks.

I would recommend using remove.bg, which is a free online tool which removes the background to an excellent standard, for free and almost instantly.

Here's a couple of videos on how to use it, one when combined with Photoshop and another using photopea.com, which is a free online app so close to Photoshop that it has the same shortcuts, layout and icons.

If you don't have Photoshop, photopea.com is the tool I would recommend to use to tweak the draft cut produced by remove.bg. It's more powerful and versatile than GIMP and other similar tools.