I'm currently at a laundromat that advertises FREE DRY! For two years the drying has been free but now the drying price is $1.96 for 50 minutes. Wrong

If they still advirtise it, you can contact the department of consumer protection.  they ar e free to change thier policy if they stop the ad.  YOu are also free  to go elsewhere and give bad reiews if you feel you are cheated.  The cost of a law suit would not make sense in such a case. good luck.