Bests & Worsts Reviews from Amazon

I just received this meter, and like so many other reviewers I thought it was a piece of junk due to the ph registering 70 on every soil test I made. Even read this when I mixed 30% acetic acid (vinegar) with the soil. Read 70 when i tested peat moss mixed with a lot of moisture. Then I read a couple of reviewers who said you needed to rub the points and sensors hard with an abrasive. One person said that the only thing that worked for him was using a wire brush. Well....that is exactly what worked for me!! I cleaned the probes and then scrubbed with a wire brush for about a minute and --VOILA: as soon as I then took the meter and tested the acidic solutions that had registered zero they jumped to acidic. The peat moss was 4.5, which is normal, and the vinegar mud was the lowest it could register. My container plants with roses, which need a pH of 6-6.5, are now registering 6.5-7 and I will only need to amend the soil slightly on some. Thanks so much to reviewers who have taken the time to give these quick fix instructions. I am happy with this product now. I just think the manufacturer needs to amend their instructions.