How to Keep Your Cosmos Wood Pocket Knife Sharp and Clean

Quick answer

Sharpen the blade with a fine diamond or ceramic hone at the factory angle, then wipe the edge clean and apply a thin coat of knife-safe oil to the wood-and-resin handle. Avoid dish soap, soaking, and high heat.

Step-by-step sharpening and cleaning routine

1. Clear the workspace and gather supplies: Set out a fine diamond or ceramic hone, a leather strop with compound (optional), a soft cloth, a small brush, knife-safe oil, and a drop cloth. Work over a surface where a dropped knife won't cause damage. Never sharpen over a sink or hard floor where a slip can ruin the edge.
2. Clean the blade before sharpening: Wipe the blade with a dry soft cloth to remove tape residue, sap, or grit. If needed, use a cloth barely dampened with water and mild soap, then dry immediately. Do not soak the knife or let water sit around the pivot. A dirty blade clogs the hone and gives a false sense of sharpness.
3. Find and match the factory edge angle: Lay the blade flat on the hone and raise the spine until the bevel sits flush. Most pocket knives use a 15–20 degree per-side angle; match the existing bevel rather than guessing. Use a marker on the edge to confirm you are hitting the full bevel. If the marker only wears at the very edge, you are angle too steep—lower the spine slightly.
4. Hone with light, consistent passes: Use light pressure and sweep the edge across the hone in overlapping passes, alternating sides. Keep the angle steady. Stop when the blade slices paper cleanly along its full length. Heavy pressure rounds the edge; let the abrasive do the work.
5. Strop to polish the edge: If you have a strop, make 5–10 trailing passes per side with light pressure to remove the burr and refine the edge. Skip this step if you only used a fine hone and the edge already feels smooth. A burr left on the edge feels sharp but dulls quickly—check by running a finger perpendicular to the edge (carefully).
6. Clean and dry the entire knife: Brush dust from the pivot and handle with a soft brush. Wipe the blade dry, then use a cloth barely dampened with mild soap to clean the handle if needed. Dry immediately with a soft cloth and leave the knife open to air-dry completely before closing. Never use dish soap, alcohol, or solvent on the wood-and-resin inlay; they can dry or cloud the finish.
7. Oil the handle and pivot sparingly: Apply one or two drops of knife-safe oil (such as mineral oil or a dedicated wood-safe product) to a cloth and rub it into the wood inlay. Wipe off excess. Add a single drop to the pivot if the action feels stiff. Oil the wood only when it looks dry—over-oiling attracts dust and can soften the finish.

Product facts

• EDC Wood Pocket Knife - Jonna (Cosmos, 824025): The blade is Damascus stainless steel and the handle combines a titanium frame with wood burl and resin inlay. Stainless steel resists rust but still benefits from drying; the wood-and-resin inlay needs oiling rather than soaking to stay stable.

  

• EDC Wood Pocket Knife - Jonna (Cosmos, 824025): Every knife is assembled and tested at the shop in Elkhart, Indiana, and backed by a 100% Satisfaction Guarantee. If you notice a defect or unusual resistance during sharpening, contact the maker before attempting repairs yourself.