I have been using a baby walker and maintenance some rules. I will just suggest you when baby use a walker for short periods of time, say, half an hour, then let him/her take a break. Using a walker is okay. It is perfect for little ones learning to walk and trying to stand on there own.
Just make sure you wipe it clean every day. Put proper clothing on your baby, because their, private parts will be in touch with the fabric of the walker.