I use blue 3M Painter's tape to help with bed adhesion on my heated bed. Are there any tell tale signs which would lead me to believe I need to change the tape out?
For reference, I haven't been printing all that much, so the tape has been on there for some time. I took a look at it today and see there are some bubbles in the tape in the places where the last print I did was laid down. It appears the tape has lost some adhesion to the bed. I can run my fingers over it and it will re-stick to the bed, but is that good enough? (Obviously I'd re-clean the tape surface with isopropyl before I'd use it again, so not an issue there.)
The last thing I want to do is waste time and materials printing when I can be more proactive, so the real question here is:
What signs might the tape be giving me it's time to change it out?