Ask her to see what she would like. You can’t read minds and she might have changed her’s since a month ago. Of course she might not have either.
“Wow, there is a lot of ice out there. I’m cleaning off my car. Would you like me to clean your’s as well.”
This allows her to have her say. And you follow it. If she says yes - don’t expect a thank you.
If she says no, that’s fine. Happily go about your day.
You have given her the choice. I’ve watched my four stubborn teenagers all grow through things like this. They need to struggle and rebel, and part of that is turning down an offer and finding out how much work is involved. It is also realizing that they can do it, and that struggling and stubbornness does achieve results. It’s a step towards independence. It’s growth.
It will be interesting to see where she is and what she will do with you offer.
DnJ
Feelings are fleeting. Be better, not bitter. Love the person, forgive the sin.