we try to claim our dnf's wisely. we will log a dnf if we truely can not find it. we also use the write note option if we just did a quick search because of tired kids to many people around, bees, rain whatever the excuse. but we will not log it as a find if we don't sign the log. there was one cache we logged as a find with owner permission after sending him photos of where the cache should be. he was happy to know someone found it because it was a higher difficulty hide and also glad to see proof that it was gone.