A few months prior the dryer heat worked off an on for a couple weeks, but then it healed itself somehow. This time there was no heat at all, so I started with the how-to videos--and narrowed it down to fuses or heating element based on the fact that the dryer was running but not heating. Unfortunately there was no specific video on my Kenmore 110.68722700 dryer, and some videos suggested that I'd have to access things from the back, others said from the front. Since I had a removable front panel, I started there--and much of the suspect parts were visible once the panel was off. I tested them with a cheap multimeter--which I learned to use watching more videos. This confirmed that the heating element was dead. (The new element also tested fine prior to install).
I watched about 3 or 4 Kenmore videos before I found one with an element that looked like mine. I took off the front heat shield and the 1 screw I could see that connected the heating element to the chamber around it, and pulled, but the element would not move--I wasn't sure how hard I could pull without breaking it. I re-watched the video and they said it could be snug, so I pulled harder with a pair of vise-grips and it came loose. The new one also slid back in fine, and the fit was similarly snug. I put it all back together, and the multimeter again confirmed that my install was successful.
Since I had the front open and the blower cover was right there, I opened it (4 screws) to see how clean it was. Pretty mild, lint and crud (14 year old dryer). I cleaned that, and all the loose lint in the base of the machine, and closed everything up. I ran it for 10 mins, and the dryer heated (yay!) but the but the exhaust pipes did not warm up, so I figured there must be a clog. After cleaning them out (I have about 12 feet of metal venting to the outside) everything worked great. $85 bucks for the element was a win.
Last note: I was surprised at how much lint had accumulated since I cleaned it last year. But then I remembered that I had cleaned at the beginning of the COVID lockdown, so it had been almost 3 years. So, if you see heavier than expected lint coming out of your exhaust vent, trust what you see, not what you remember.