First of all, DO NOT filter the CS just because the electrodes got tarnished. That is perfectly normal and just requires that the electrodes be wiped down. Filtering was necessary with some of the inferior methods of making CS, or if you brew it way too long and clumps of silver sludge drop of into the water. Even then, you do not need to filter, just carefully pour off the CS and discard the particles on the bottom after its all settled. But again, you should NEVER see particles in you CS! Filtering is not recommended! If you have to filter, you have a real junk batch of CS!
Once you have a decent brew, then talk to us about the taste..it should be hardly noticeable. I hope you checked your distilled water with a PWT or TDS meter. If it has a high TDS count, it could ruin your brew. The Silver Puppy should never produce the kind of brew you described.