i have one and i use it frequently. i have it adjusted such that i can see very clearly, until recently. i have the right angle eyepiece and started noting a fuzziness and loss of clarity. i cleaned the mirror and end of the fiber optic to no avail. a friend wanted me to look in his barrel at the range on sunday so i took the scope apart to put it in the carrying case...THERE WAS THE PROBLEM! the glass/lens of the right angle piece was cloudy! cleaned with the cleaning solution and VOILA... crystal clear! ther is dirt, etc in the air we breath! i'll check this more often.