No - I used them for the first few weeks, I told my dentist the flouride irritated me greatly he said keep your mouth clean brush if you can with a soft tooth brush, try using the trays on weekends only. I still use the trays - they are for life and they still hither my tongue and mouth... Flouride can irritate your mouth - they do have ph balanced ones but apparently they are expensive. I've tried two so far the second was less irritating but still not great - I have an appointment with my dentist next month, and will change to the most expensive but ph balanced then - right now because of the irritation it don't use them right before bed (which is ideal)- but I do use them daily . I have breakfast, brush and water pik, then flouride... After 2 hours I rinse With the baking soda solution... I also use a very expensive toothpaste that's ph balanced but high in flouride and an alcohol free and gentle mouthwash in my waterpik! Makes me feel fresh. Hoping to be able to do the before bed thng again with the trays once I get the new flouride. I should have told him to give me e most expensive one from the outset - bottom line dental care can cost a lot more! Take care and good luck... You'll do fine!