I found out that my D7000's sensor had a few dust particles so i decided to clean it. However the blower did not work and i used the a dry cotton bud to clean it. Now the sensor seems fairly clean and after that i realised that i was not supposed to use cotton bud to clean the sensor. I was wondering if anything would happen to the sensor and which is the best and most efficient way to clean the sensor next time. Thanks!
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