I am a fan of replacing plastic occasionally anyway. When you amortize the cost over the life of the item what is pennies per beer to keep your equipment safe and fresh.
This is why I have never upgraded to stainless racking cane, even though it is not a bad idea. Another reason is that you can't see if a chunk of some whatnot is adhering to the inside of the tube.
On Tap: 1. Kelly R. IPA, 2. Roter Hund Hefeweizen, 3. Bud Killer Blonde, 4. Red Dog Pale, 5. Roter Hund Oktoberfest, 6. Pumpkin Ale, 7. McRed's Stout (with new nitro system and stout tap,) Cream Soda, 8. ESB # 3, & 9. Ordinary Bitter.