DIY help needed - removing old tile adhesive

I've cleaned old tiles by soaking them in hot water, but you will need to leave them in there for 24 hrs or more, then it should scrap off. If a glue, such as Evostik has been used (unlikely) you won't get it off without a solvent and most of the solvents for those glues are pretty nasty and not readily obtainable, it would probably spoil the tile anyway.
Try hot water, but give it plenty of time to soften.

Don't worry if soaking in water for a long time stains the front of the tiles, it will disappear as they dry out.

I've managed to clean off adhesive from old tiles. I put them in water with some liquid detergent added and left them soaking for ages (weeks in fact). I then put the tile on a few layers of old towel and gently used a hammer and old chisel to remove the adhesive. Messy and painstaking but it was worth it in the long run. I did it on the kitchen worktop using the back wall as support as you don't want the tile to break!

Good luck.

Thank you, all.

Or I mean both

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I wasn't sure whether this latest post was an ad (but checked the link yes it is and I've reported it).

Anyway, gives me an excuse for a quick update, thanks so much everyone the long soak in hot water and detergent worked a charm and we managed to salvage enough tiles to repair/replace as needed. What makes me smile to myself is all the young people in the house ooh-ing and ah-ing about the "vintage" look when the tiles are quite horrible (pink, albeit pale pink which is what saved them) with occasional floral ones. Funny how quickly "kitch" can become "retro" "original features". Everyone's happy, which is the main thing!

Watching these design make over programmes where they "up-cycle" junk into useful household items. Unfortunately they still look like up-cycled junk.