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In the final analysis, you can't "filter" your lust away. Filters are there as a line of defense, but they are no substitute for sincere Teshuva and battling the Y"H. When I started trying to make this go away, I put up filters and said "OK, that's all I have to do" and it didn't help at all because I just broke through everything. Now, I know I can get shmutz if I try hard enough, but thanks to GYE, I feel distanced enough from lust that I don't feel compelled to do it (long may it last!).