Some shooters carry tow to clean out their rifles in the field(on a trek, etc) How much tow do you need and can the same amount of tow be used over again or just one time? If the tow gets dirty, do you clean it or leave it alone? What other field cleaning procedures can you use on a muzzleloader if you are in the field and won't be back home for several days? Do any of you use hot soapy water in the field?