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I can't remember the spray I have, but it is the cleaner of the same make as one of the polymer sealants. I will look at it & come back to you on that. It won't remove all silicone but will help remove layers of it.
The "rubber" tools I have for working silicone are actually made of silicone rubber & have different corner shapes - all tapered of square, round & various bite shapes corners. I got them from Lidl for about £4. I find I can get them to flex against the tiles, removing all the silicone even where the tiles have dips or joints. I should have had them years ago.
 
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