That is a pretty low download speed for Spectrum. Even their slowest speeds (Spectrum assist) are 50 Mbps which you should be getting roughly 75 to 80 percent of that guaranteed. Typical internet packages from Spectrum are 100 to 200 Mbps with 500 and 600 now common for their packages. Check to see what internet plan you have to see what speeds you should be getting. They guarantee 80 percent of that speed, whatever package you are signed up for. I would also contact Spectrum to have them do a test on your line to see if noise or the signals are messed up creating issues. I had something similar a couple years ago, where the signal noise created issues and it turned out it was a broken pin on Spectrum's port that controlled the network in the area that caused intermittent issues.
It is also possible that the modem needs to be updated or replaced or changed to one that handles the latest protocols and speed.
