i've only had kinky twists 4 times - but i'll let you know what i've learned:
BEFORE:
1. deep condition your hair to help strengthen it for the process
2. moisturize your hair well the day before so you have dry, non slippery but still well moisturized hair the day of twisting
2a. if you do your own twists and your are natural, then you might find it help to pretwist your own hair first (and then when its time to add extensions, untwist the twists one at a time and add in the hair - that way your hair is pre-sectioned and detangled already
)
DURING (twisting):
1. only use a dab of gel and only add gel to fake hair
1a. do not add a bunch of product in your hair - no mouse, no hair spray, no oils
2. keep your hands taunt during the twisting process - keep it tight
AFTER (twisting):
1. lightly spray your hair with braid spary (or whatever non-oil/light oil spary you use to moisturize your hair) - only about 7 pumps for your whole head
1a. do this every night
2. immediately tie your hair (but not so tight that it hurts
2a. tie your hair down EVERY night (i tie down the front with a scarf and then but on a bonnet to protect the back)
3. don't excessively style and tightly pull (ponytails) your twists - keep your hands out of your hair and be gentle
4. shampoo and condition your SCALP weekly (do not vigorously rub!) and just rinse your hair with water
4a. immediately after washing just squeeze the water out with a towel, spray your hair with braid spray and tie down your hair
AFTER(removing the twists):
1. gently remove the twists
1a. i lightly spray my hair with water and put oil on my fingertips as i unravel the twists and moisturize each section of my hair after i remove the twists
2. DC after all the twists are removed
2a. i henna and then follow up with a moisturizing DC
3. have a low-mani style the week after twists
3a. i wear twists (just my hair) - no puffs, no ponytails, no clips, nothing, just let my hair rest
HTH!