Our best friends have kids that we can't stand

Tl;dr: Friends are great except they let their kids be enormous brats when they are at our house and I can't take it anymore.I met this couple through my wife 7 or 8 years ago and I'd say they are probably our best friends. I really enjoy spending time with them and have since I first met them.About 5 years ago we both started having kids and our kids are all super close in age so it is great that they get to play together when we all hang out.We don't do much, either go to their house or they come to our house. Well BBQ, play video games, play with the kids outside, whatever. If we go to their house they are strict. Their kids only eat in the designated area, no drinks around the house, no shoes in the house, toys get picked up, no playing in the bathroom, etc. If their kids don't follow their rules there are always spankings or time-outs. Of course we ensure that our kids adhere to all of that as well and it's never an issue.The problem is when they come to our house the rules just go out the window. We have our family eat at the table so that's where we set up their kids and all as well. Doesn't matter, their kids will pick up their pizza and run through our house. We don't allow shoes in the house, their kids will keep theirs on and jump on our furniture. We don't let our kids rummage through our very-much-out-of-reach bills, mail, documents, whatever. Their kids will pull out drawers to use as stairs and get into everything that they shouldn't.Over just the past few months their kids have stained our brand new area rug by pouring my wife's makeup onto it and stomping it deep into the fibers, they've ruined pillows and blankets the same way, they've broken baskets and containers by using them as steps and ladders, and actually even pried unfinished floor trim off of the walls. This stuff will happen in minutes while they are out of sight.We do our best to correct the situations and even more so to try to prevent them at all, but the kids are relentless. The worst part is that the parents JUST DON'T CARE. They will sit there and here us saying over and over "no guys don't climb up there", "if you're gonna be inside please take off your shoes", "hey no more touching the tv", etc., and they just completely ignore it, as if it isn't happening.Today our kids actually weren't even here while our friends and their kids were and they trashed the house. The mom mentioned it and told her kids that they would need to clean up everything before they left. But of course when it came time to leave not a single toy was picked up.It's to the point where we don't want to ever have them over because when they leave it's a huge cleanup for us and we're tired of finding broken items and food, spilled drinks, or other trash hiding all around the house. Neither of us want to ruin the friendship, my wife has been friends with them for 15 years or more and myself for about 7 or 8. They really are great people outside of this issue. Like the kind of people that would come over in the middle of the night to help you in an emergency or whatever. I'm not even sure what I'm trying to say, I'm tired from just spending the day with them and then the night cleaning.Does anyone that's been through something similar have any advice? via /r/Parenting http://ift.tt/2o4PJ73