the present invention will be understood from the following detailed description of preferred embodiments , which are meant to be descriptive and not limiting . for the sake of brevity , some well - known features , methods , systems , procedures , components , circuits , and so on , are not described in detail . the terms “ up ”, “ down ”, “ top ” and “ bottom ” refer herein to the position where the teeth are up and the comb body is down , as depicted in all the figures . fig1 depicts a lice comb , according to one embodiment of the present invention . a lice comb 2 , according to one embodiment of the present invention , includes teeth 4 extending from the body 8 of the comb , and a teeth cleaner 14 . teeth cleaner 14 may clean teeth 4 by raising and lowering thereof , i . e ., by moving teeth cleaner 14 along teeth 4 away from body 8 . each tooth 4 is inserted into a hole 20 of teeth cleaner 14 , thus relative motion between hole 20 and tooth 4 cleans tooth 4 . all holes 20 or at least a cluster of holes 20 of teeth cleaner 14 move altogether along teeth 4 , since a perforated bar 6 binds holes 20 together . upon lowering teeth cleaner 14 to the lowest location , a lock 12 may lock it to a lock state . fig2 depicts the lice comb of fig1 , in the locked state . in the locked state , lice comb 2 functions and seems like a common lice comb . the user may comb the hair until the comb fills with lice , dirt and hair . instead of the prior art cleaning , a handle 10 may unlock teeth cleaner 14 , for releasing thereof , and then , raising teeth cleaner 14 to the state depicted in fig1 removes the lice , the dirt and the hair away from teeth 4 . fig3 depicts the lice comb of fig1 , in the disassembled state . according to a preferred embodiment , a springy element 18 may normally locate holes 20 at the bottom of teeth 4 , i . e ., close to body 8 of comb 2 , which is the position allowing combing . thus , cleaning teeth 4 is performed by raising teeth cleaner 14 against springy element 18 . release of teeth cleaner 14 returns teeth cleaner 14 , by springy element 18 , or by manual motion , to the combing state . according to one embodiment , teeth cleaner 14 may be detached from comb - body 8 and from teeth 4 . fig3 depicts a track 16 in comb - body 8 . according to one embodiment , the disassembling may be done by raising a limiting element 24 ( depicted in fig4 ) against springy element 18 beyond the cleaning state depicted in fig1 . thus , holes 20 are raised above the edges of teeth 4 , and are no longer held by them . re - assembling teeth cleaner 14 is performed by inserting limiting element 24 ( shown in fig4 ) into track 16 , raising it against springy element 24 , and inserting teeth 24 into holes 20 . fig4 is a two - dimensional sectional view of the lice comb of fig1 . teeth cleaner 14 , having holes 20 , may move in relation to comb - body 8 with teeth 4 limiting element 24 of teeth cleaner 14 is movable within track 16 of comb - body 8 . limiting element 24 limits the motion of teeth cleaner 14 , such that holes 20 clean most or all the length of teeth 4 . according to a preferred embodiment , each of holes 20 is elongated , for example , having length l . limiting element 24 limits the raising of holes 20 , such that the top 44 of hole 20 can reach a selected height at the top 42 of tooth 42 or even beyond , while hole 20 is yet held by tooth 4 . thus , the entire length of tooth 4 may be cleaned . lock 12 includes a projection 26 , falling into a recess 38 . upon being pushed to the bottom projection , 26 of limiting element 24 falls into recess 38 , locking teeth cleaner 14 into that position . fig5 is a two - dimensional sectional view of a lice comb , according to another embodiment . teeth cleaner 14 having holes 20 may move in relation to comb - body 8 having teeth 4 . limiting element 24 is movable within track 16 of teeth cleaner 14 . upon pushing teeth cleaner 14 to the bottom , which is the combing state , projection 26 of limiting element 24 falls into recess 38 of teeth cleaner , locking teeth cleaner 14 and comb - body 8 into that position . fig6 is a two - dimensional sectional view of the lice comb of fig5 at the cleaning state . teeth 4 of fig5 are shown being cleaned by holes 20 of teeth cleaner 14 , as teeth 4 do not outwardly extend in this state . in the figures and / or description herein , the following reference numerals have been mentioned : numeral 2 denotes a lice comb according to one embodiment of the present invention ; numeral 4 denotes a tooth of a lice comb ; numeral 6 denotes a perforated bar , including a cluster of holes ; numeral 8 denotes the body of the comb ; numeral 10 denotes a handle for locking and unlocking the lock ; numeral 12 denotes a lock for locking the holes of the teeth cleaner to the bottom of the teeth ; numeral 14 denotes the teeth cleaner ; numeral 16 denotes a track ; numeral 18 denotes a springy element for pushing the teeth cleaner downwards ; numeral 20 denotes a hole surrounding a tooth ; numeral 24 denotes a limiting element , for limiting the motion of the teeth cleaner ; numeral 26 denotes a projection ; numeral 38 denotes a recess ; numeral 42 denotes the top of a tooth ; and numeral 44 denotes the top of the hole . the foregoing description and illustrations of the embodiments of the invention has been presented for the purposes of illustration . it is not intended to be exhaustive or to limit the invention to the above description in any form . any term that has been defined above and used in the claims , should to be interpreted according to this definition .