I made a stove. I put a light inside, for the light that's on when you're cooking something. I just found out how to make the window in the door glass to see trough it, but now there's the problem that it's very distorted with refractions and I also can't see the baking tray I put inside. Is there a way to make the glass fully transparent?
Based on the image in your question, it doesn’t look like what’s causing the issue is refraction, but reflection. It’s hard to tell exactly why you’re getting so much reflection without more information about your specific materials and scene, but there are a few possibilities:
The normals on your glass pane could be pointing the wrong direction. Try recalculating them by selecting the faces in Edit Mode and pressing ShiftN.
The IOR on your material could be too high. The IOR of real glass should be about 1.5, but you could try lowering it closer to 1.0 to see if that looks better in your scene.
You might simply want less strong specular reflection than what the Principled BSDF provides. The Principled BSDF generally tries to be physically accurate, so deviating from it is likely to produce less technically realistic results, but you may want to do that, anyway, for artistic reasons.
In that case, you can manually combine a Refraction BSDF with a Glossy BSDF to get finer control over the amount of reflection:
By using a lower IOR for the Fresnel mix factor than you use for the Refraction BSDF, you can artificially lower the amount of reflection as low as you desire.