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| Method | Result | |--------|--------| | | Complete failure. Outside drains have constant organic matter; these liquids just dilute and do nothing to sludge or roots. | | Boiling water | Useless for buried pipes – the water cools before reaching the clog. Also risks cracking old clay pipes. | | Drano or Liquid Plumr | Dangerous and ineffective. The chemicals sit under the grate, damage rubber pipe joints, and harm soil bacteria when they leak out. | | Shoving a garden hose in with a rag (poor man’s jetter) | Mild success for loose leaves, but fails against compacted mud or grease. |