I have slow internet speeds around 6 or 7 pm everyday.

Is this with a WiFi connection ? If so, as a test, does a computer / device that is hardwired directly to the router / gateway device with an ethernet cable have the same problem ?

With this test, we are trying to isolate this down to being either a WiFi-only problem or a problem with the general connection to the Comcast system which would of course affect both. It's a good first step in troubleshooting before proceeding any further. 

@Keotto90 Thanks for reaching out to our community and letting us know about the slow speeds you're experiencing between 6 and 7pm each night.

Can you tell us more about when this started?

How long does this slow speeds last for?

Have you had the opportunity to reset your modem and your connected devices? 

@Keotto90 

Have you had a chance to try that test yet ?

Ditto here in NW Chicago area. When it is slow, the Xfinity help bot doesn't respond. When it does when service speeds up, then it is too late and useless. It's a cutesy little public relations toy but does nothing to help.

@user_kgfwso 

Please create a new topic of your own here on this board detailing your issue. Thanks. The original poster has not returned. 5-month-old dead thread is now being closed.

For future reference, it is better to submit your own post as it creates a ticket to get help, and posting on someone else's older thread can delay getting help.