How to Clean Trading Cards Safely (Without Lowering the Grade)

Cleaning a trading card the wrong way can lower its grade or get it flagged as altered. The safe approach is limited to removing loose surface debris — never solvents, polishes, or anything that changes the card's surface or edges.

Quick answer

Safe card cleaning is limited to gently removing loose dust and debris with a soft, dry microfiber cloth and, for slabs, a tiny amount of plastic-safe cleaner on the case only. Anything that alters the card surface, edges, or corners counts as alteration and will hurt — or void — a grade.

What's safe vs. what's alteration

Action	Safe?	Notes
Soft dry microfiber wipe of the surface	Yes	Light pressure only
Removing loose debris with a soft brush	Yes	No scrubbing
Cleaning a slab's plastic case	Yes	Plastic-safe cleaner, case only
Erasers, solvents, or polish on the card	No	Counts as alteration
Wiping with water or wet cloth	No	Risks surface and warping
Trimming or sanding edges	No	Fraud; voids grading

Step-by-step (raw cards)

1. Work over a clean, soft surface in good light.
2. Hold the card by the edges to avoid fingerprints.
3. Lightly wipe the surface with a dry microfiber cloth in one direction.
4. Use a soft brush for textured or foil surfaces to lift debris.
5. Stop immediately if you see any surface marking — do not press harder.

Step-by-step (graded slabs)

1. Apply plastic-safe cleaner to the cloth, never directly on the slab.
2. Wipe the case gently to remove smudges and dust.
3. Buff lightly with a dry section of the cloth.
4. Never open the case — that voids the grade.

What NOT to do

• Don't use household cleaners, alcohol, or polish on the card.
• Don't use erasers to remove marks — graders detect this.
• Don't wet-clean — moisture warps cardstock.

How AI pre-grading helps

Before grading, scan the card to see whether surface debris is actually affecting the predicted grade — often it isn't worth touching at all.

CardSense AI predicts grades and sub-grades so you can decide whether a card is grade-worthy as-is.

FAQ

Can I clean a card before sending it to PSA? Only with a dry microfiber cloth to remove loose debris. Any chemical or abrasive cleaning risks an "altered" designation.

Does cleaning improve a card's grade? No — at best it removes loose dust. It cannot fix scratches, print lines, or wear.

Related guides

• Storing cards
• How to protect cards from humidity
• Should I grade my card?

The bottom line

Safe card cleaning means a dry microfiber wipe and nothing more. Anything that alters the surface or edges is fraud and will hurt your grade — when in doubt, leave it alone and pre-grade first.

Last updated: June 1, 2026.