Thank you everyone for your responses. I'm learning a lot about signals and how they can be affected by other wireless signals. So I'm guessing there is not much I can do if the interference is from wireless carriers?
There are some things you can do such as ensure all connections are tight and that there are no unterminated runs or splitter feeds.
You bring up some great points and it is quite common. All the time, we hear about techs that need to run a new coax because it is damaged in the ways you described. In addition, coax gets damaged when it is pinched under furniture and entertainment centers. Thanks for your thoughts!