Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works Great - sort of

I've owned the product 3 months. I purchased this product because I'm a middle aged person with braces and found the full size water pik setup to be invaluable dealing with the situation. If this product didn't have the following shortcomings I'd rate it 5 stars because it is a tool I use every day. Design issue #1: The battery. The water pressure just isn't there anymore and this thing is only 3 months old. As it runs you can hear it slow down as it pumps the water #2 The charger inlet falls open easily and water gets in the charging area. BAD. #3. There is no good way to clean out the water holder and it goes stale. I've taken to flushing it with mouth wash and storing it open and upside down.