Those guides are very common to fall apart. The best thing to use is kone rail lube (konespares part #US53940001) or I prefer to use marvel mystery oil. The biggest thing is to not have grease on the rails/guides since it could speed up deterioration of the slides and could cause the safeties to fail. Also, it's VERY common that the car is twisted rather than the rails being out of alignment. Honestly, I've yet to see a kone unit not twisted. You'll just have to replace the guides every few years