Is getting nipple wipes necessary?

I bought a box of nipple wipes after giving birth to second child. I find it is very wasteful as I need to wipe each time before nursing especially during initial months where baby tends to nurse more often. I would like to suggest to use wet cloth with boiled water to wipe and it is more economical. However, you may standby nipple wipes when you are outside with baby as it is more convenient to use ready one.