CLIP IN HAIR EXTENSIONS- foxy locks vs Luxy?

i have luxy- the girls are so sweet and they really are so nice, BUT you have to baby them, after the first 3 months they turned bad. i use CHI silk infusion on them all the time so they dont get tangled but it doesnt really work and they always get matted at the back of my head,...even if im not doing anything they are always majorly tangled by the end of the day...