Getting rubber underlay stains off quarry tiles

[DitaVonCheese]

I think this might be my most curiously specific thread ever

Can anyone help? We are in the process of renovating a 50s house we bought a few months ago. Most of the rooms downstairs have original quarry tiles but they've had carpet + underlay on them for 30-odd years. I would quite like to keep the tiles in the hall but the underlay has perished a bit and left wiggly stains on the tiles. Is there anything I can use to get them off other than good old-fashioned elbow grease (which I lack)?

Also should I be sealing them or anything? They are quite weirdly absorbant.

Thanks in advance if anyone has read!

Try heating the room so the rubber softens and then a wallpaper scraper?

I think you do need to seal quarry tiles. Google it!

Cheers :) Hardest room in the house to heat but could use hairdrier or wallpaper steamer I guess. Not sure there's anything to rub off though, think it's just stains iyswim. I think I might just have to try a really good scrubbing and see if that shifts them, or start bombarding Lakeland Direct for advice ... Thanks for replying :)