I have a Vertec 100 gpd ro/di with the built in booster pump. I went to make water today and I expect the first gallon or so of water to read a some ppm and then it is back to 0. Today it has run and not dropped to 0 after making about 10g of water. I did notice that the waste water is just pretty much dripping. I have made the unit backwash itself several times and it is just not sounding right. Any suggestion would be great.