Recommended Cleaner for Dock Ladder W/ Lake Sludge

Updated 01/05/2026 | Published 09/24/2024

Products Featured in This Question

Jif Marine Retractable Floating Dock Lift Ladder - 5 Steps - 750 lbs - Aluminum - 4" Deep Step

(4)

$446.87

Thetford Premium RV Black Streak and Bug Remover for RVs, Cars, and Boats - 32 oz

$14.77

Question:

I inadvertently left dock ladder down in lake water for a couple of weeks, and lake sludge accumulated on all submerged surfaces. What cleaning products and cleaning techniques do you recommend for removing the sludge?

asked by: Karl S

Expert Reply:

Hey Karl, I'd recommend using some Thetford Premium RV Black Streak and Bug Remover for RVs, Cars, and Boats # TH89HE. This cleaner will work great removing in removing that lake sludge, and is safe to use on gelcoat, fiberglass, and painted aluminum.

expert reply by: Bryce D

Jesse M.

1/5/2026

Hey Karl, how did the Thetford cleaner work on the lake sludge from your dock ladder? Your update could make it easier for others dealing with the same buildup.