Guitars and basses

Perspiration and residues accumulate particularly on strings, fingerboards, bridges and areas touched by the hands and arm.

After use, a dry cloth on strings and frequently touched areas reduces build-up. During a string change you can clean more thoroughly, choosing products compatible with the fingerboard material and finish.

Do not automatically apply oils to a fingerboard; some materials and finishes do not require them. Follow manufacturer guidance or reliable technical information for the specific instrument.

Changes in action, intonation or tuning stability can have several causes.

Inspect the bridge, saddles, tuners, screws, strap buttons and moving parts before making adjustments. If something has loosened, identify the cause and use correct tools without forcing threads or screw heads.

Work on the truss rod, nut and neck geometry requires greater competence. If you do not understand the system, professional setup is preferable to a sequence of random corrections.

Crackle, interruptions and volume changes can come from the cable, jack, potentiometer, switch or a solder joint.

Before opening the instrument, rule out external causes with a known-good cable and amplifier. Check whether the problem appears when a specific control or connector is moved.

Tightening a loose external nut can be straightforward, but avoid rotating the internal component and twisting its wires. If soldering is required or the fault is unclear, document the symptoms and use a technician.

On acoustic and semi-hollow instruments, unusual changes in action or intonation may accompany structural movement.

Inspect the bridge, top, joints, binding, neck and any new cracks or openings. Do not automatically treat every seasonal movement as a defect, but document changes that continue to progress.

If cracks, separation or obvious deformation appear, avoid aggressive setup changes that may mask the issue and have the structure assessed.