Treat the boot as a complete construction
The visible lining may be wool, but below it can sit a footbed, foam, adhesive, seams, and the boot sole. Avoid pouring water or cleaner into the boot.
Check the care label before cleaning. If it does not approve a full wash, work only on accessible areas with minimal moisture.
Remove dry debris first
Turn the boot opening downward and tap gently. Use a soft brush or a narrow upholstery tool on very low suction only where you can control it.
Do not pull at the lining around seams or force a tool deep into the toe.
Blot small lining marks
Use a clean cloth barely dampened with cool water and blot the affected wool. If the care label permits a sheepskin-safe cleaner, test it first and use only the directed amount.
Avoid bleach, strong detergent, household disinfectant, and fragrance-heavy sprays that may leave residue.
Open, support, and air dry
Blot excess moisture, loosen laces or open zippers where appropriate, and support the boot shape lightly with clean tissue.
Let the boot dry at room temperature with good airflow. Wait until the toe and footbed are dry, not only the shaft lining.
Use professional care for deep spills
A liquid spill that reaches the footbed, a large oily mark, or persistent odor may sit below the visible wool.
Repeated surface cleaning cannot always reach the source and may over-wet the boot. Professional sheepskin footwear care is the safer escalation.