How do I remove grout from shower door? How can I add a curtain to my shower door?

How do I remove grout from shower door? How can I add a curtain to my shower door?

I think this brown stuff is grout, it’s so hard to remove I can’t even scrape it off with sissors. I don’t want spend $10 on a grout spray is there any other affordable way I can easily remove this? Also how can I put a shower curtain on this door? As there’s no pole? Or should I leave the door how it is without a curtain?

How do I remove grout from shower door? How can I add a curtain to my shower door?
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