How to Clean a Shure SM58 Microphone Grille and Foam

Step-by-step instructions

Step 1: Disconnect and identify the microphone

Mute the audio channel before unplugging the XLR cable, then move the microphone away from the mixer and other powered equipment. Confirm the model rather than relying on the familiar ball shape: an SM57, condenser microphone, or wireless handheld may need different handling. The SM58 user guide identifies its model variants and replacement parts. Keep the connector end dry and do not undo the handle or pull at the cartridge wiring as part of routine cleaning.

Step 2: Wipe the handle while the grille protects the capsule

Leave the grille in place for this first exterior pass. Use a soft cloth carrying only a small amount of mild soapy water, then remove residue with a clean lightly damp cloth and dry the handle. Work around the SM58S switch instead of flooding it. Shure's microphone-cleaning instructions distinguish exterior wiping from washing detached parts. Do not spray into the mesh or connector, use hand sanitizer, or mistake a rugged stage microphone for a sealed waterproof device.

Step 3: Remove the grille without touching the element

Carefully unscrew the ball grille while holding the microphone body securely. Put the body on the dry side of your work area where splashes cannot reach it. Inspect the foam lining inside the grille. If it lifts out with gentle pulling, remove it; if it is glued in place or resists, leave it attached. Do not scrape the microphone element underneath. A stuck grille or crumbling material near the capsule is a reason to stop and ask Shure about service, not to add penetrating oil.

Step 4: Clean the metal grille using the correct foam branch

If the internal foam came out, clean the detached metal grille with water and a soft toothbrush; mild soapy water is also an option for the grille alone. Rinse it thoroughly. If the foam remains fixed, choose water rather than introducing soap into material that is difficult to rinse. Turn the grille in your hand to reach its outer mesh without crushing it. Keep this wet task over a tray, away from the microphone body, and do not use a harsh scouring brush.

Step 5: Rinse internal foam separately from an external cover

Rinse removable internal foam with water for the simple method used here. Shure also lists isopropyl alcohol for that internal component, but it is not a universal recommendation for every foam cover. An optional external windscreen has its own route: warm water is the straightforward choice, and a clean replacement may be preferable. Avoid soap in foam where residues are difficult to remove. Do not try to make old foam look new by stretching it, bleaching it, or scrubbing until its structure breaks apart.

Step 6: Wait for complete drying and inspect the parts

Remove excess water gently and leave the detached grille and foam where air can reach them. Inspect the inside as well as the visible mesh; enclosed foam can remain damp after metal feels dry. There is no dependable single drying time for every room and wash method. If you need the microphone before the parts dry, fit an appropriate clean spare rather than reinstalling wet material. The RK143G replacement grille is specifically listed for the SM58.

Step 7: Reassemble and test at a sensible level

Once every part is dry, return any removable internal foam to its original position and screw the grille on gently without cross-threading. Reconnect with the channel muted, then bring the level up gradually and check speech. A quieter signal after cleaning can indicate moisture exposure; disconnect and let the microphone dry completely rather than compensating with excessive gain. Persistent changes, rattles, broken mesh, or deteriorated foam need parts or service. Routine cleaning removes soil; it is not a validated sterilization process for a shared microphone.