Child wet the bed: how to clean the mattress
We sop up the pee with rags, then we spray it with our all purpose cleaner Thieves (it's antibacterial and helps with the odor). We let that sit, then pat that as dry as we can get it before covering it up with a towel, which will absorb the rest of the wetness.
We had mattress protectors but none of them lasted through all the frequent washings of potty training multiple children. If anyone knows of well-made ones, I'll take recommendations!