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New tiles are too smooth

Posted: Fri Jul 08, 2022 3:47 pm
by thismug
I have a Mahjong set from, maybe 15 years ago.
It has been in storage and seen 0 play since purchase.
Coming back into mahjong again and...the tiles are too smooth.
When in walls, they easily slide off of each other and it is somewhat difficult to move an entire wall at once by pressing on the ends.

Is there any way, besides constant play/shuffling, to rough up the surfaces?