:salam2:
AADAAB (Etiquette) OF THE MISWAAK
(1) The Miswaak should be a straight twig, devoid of roughness.
(2) The Miswaak should be clean.
(3) The Miswaak should not be too hard nor too soft.
(4) The Miswaak should not be used while one is lying down.
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5) The new Miswaak should be approximately 8 inches (a hand-span) in length.
(6) The Miswaak should be the thickness of the forefinger.
(7) Before using the Miswaak, it should be washed.
(8) After use it should be washed as well.
(9) The Miswaak should not be sucked.
(10) The Miswaak should be placed vertically when not in use. It should not be thrown onto the ground.
(11) If the Miswaak is dry it should be moistened with water prior to use. This is Mustahab. It is preferable to moisten it with Rose water.
(12) The Miswaak should not be used in the toilet.
(13) The Miswaak should be used at least thrice (brush three times) for each section of the mouth, e.g. brush the upper layer of teeth thrice, then the lower layer thrice, etc.
(14) The Miswaak should not be used at both ends.
(15) The Miswaak should not be taken from an unknown tree as it may be poisonous.
http://www.islam.tc/Miswaak/#Guidlines%20for%20Use
and yes you can cut it. especially when it get to soft; it gets ineffective. Between hard and soft is the preferred. Ebay is a horrible place to get one by the way, U need to know what tree it is from.