Sonic Drive-In

I was there there on July 11 at 1130 pm I order a blast and I was informed that the machine was down for cleaning this isn't the first time either on was there on July 10 I was informed that the shake machine was down for cleaning why is this a on going problem I stopped there on Friday July 12 on my way home for work I was told again no shakes or blast this is getting worse if your open till 12 or 2 why aren't there selling shakes till closing