Identify the problem: loose pin, broken spring bar, torn leather, cracked link, or damaged clasp
Remove the strap from the watch case
Replace a broken spring bar with the correct size
Reinsert and secure loose pins or screws
Tighten any loose screws with the proper screwdriver
Replace damaged leather, rubber, or fabric straps
Replace broken metal links or clasp parts
Clean dirt and debris from the strap and attachment points
Apply a small amount of leather conditioner to dry leather straps
Use adhesive only for temporary minor repairs on non-structural strap material
Test the strap attachment by gently pulling on both sides
Reattach the strap securely to the watch case
Visit a watch repair professional if the strap or fittings are badly damaged