How to remove stickers from glass windows which are heated by the heat of the sun?

hi there, In my room i’ve stuck some sticker which is a size of A4 papers. And i’m trying to remove them but if i pull them out there will be some left still stuck, so i want to remove the whole sticker easily. Please try to tell me about chemicals which are present in home (salt, lemon, vinegar etc.) which will help to remove them.
By the way, I know that if there are stickers stuck on glass and heated it will be i don’t need the explaination of it.