It's the nature of wood to have knots, mineral deposits, worm holes, and unusual grain patterns. Each piece is as individual as a fingerprint and will take stain slightly different - even two boards from the same tree. This is inherent to wood and isn't a defect.
Here's how you can care for your wood furniture to maintain its appearance and structure:
Avoid placing your furniture in highly humid or dry areas, such as directly next to air vents.
Direct sunlight may darken wood furniture.
Use coasters and tablecloths or placemats when dining to avoid scratches, dings, and water rings.
Place trivets under serving dishes, especially hot plates, to keep heat from damaging the finish.
Wipe up spills immediately.
Tough, sticky spots may require a small amount of dish soap. Rinse clean with a damp cloth and dry any excessive moisture.
Clean your wood furniture with a lint free, lightly water-dampened cloth.
Dust with a soft, dry cloth.
Dust particles can be abrasive, so always dust with the grain and not against it.
Do not use harsh chemicals or abrasives on any finish.
Store table leaves properly flat; otherwise they can warp if placed on their sides.
Don't stand on chairs or tilt back while seated. It's dangerous and will loosen the joints. (Decorative wood spindles are fragile and will break when subject to undue stress).
If you have damage or a stain from an accident and you purchased a furniture protection plan within the last 5 years, contact the plan provider before attempting any cleaning or repair yourself. If you purchased the plan prior to June 2015, call 800-686-5559. If you purchased the plan after June 2015, a claim can be filed by app (iTunes & Android), phone, or website.