They may get clogged (5)
I believe the answer is:
pores
(Other definitions for pores that I've seen before include "Ropes with small holes" , "Small openings in the skin" , "Minute openings in the skin" , "Tiny holes in the skin" .)
I believe the answer is:
pores
(Other definitions for pores that I've seen before include "Ropes with small holes" , "Small openings in the skin" , "Minute openings in the skin" , "Tiny holes in the skin" .)