Small dark splash on glass

[cbscout]

Hey, good morning everyone. I got up this morning and discovered a small dark splash on my insert glass from yesterday‘s fire. I’ve used ash, which is my go to for cleaning my glass, as well as a standard stove glass cleaner (which I don’t use unless ash can’t do it which is almost never) to get it off. For some reason, it’s not completely coming off. Anybody have any thoughts as to what might’ve caused it and how to get it completely off? if I light a fire for today’s burn, will it cause more of a problem? Thanks!

cbscout

 

[begreen]

See if it burns off with the next fire. If not, and it's hard to clean, use a razor blade.

 

[cbscout]

See if it burns off with the next fire. If not, and it's hard to clean, use a razor blade.

Thanks, begreen. I appreciate it.

 

[30WCF]

Probably a little sap pocket abscess ruptured. Burn away.

 

[cbscout]

Thanks, begreen. I appreciate it.

It burned off, just like you said. If I could ask one more question, I noticed I have a rainbow pattern developing on the glass in a couple places. Is that something that can be remedied?

 

[30WCF]

You burning anything other than wood that could leave wax or plastic residue?

 

[kennyp2339]

That rainbow is just a little baked on smoke that has different levels of heat, it will come off and return, all depends on how close the glass is to splits while burning, dont drive yourself crazy with super clean glass, it will make you go mad during the heating season

 

[stoveliker]

Welcome to physics in your daily life.
The rainbow is due to the varying thickness of the layer of stuff deposited on the window during the burn.
Light will reflect off of each interface (layer to air and layer to glass), and these light waves bouncing from each interface will interfere, leading to thickness dependent colors.

All good.

 

[cbscout]

You burning anything other than wood that could leave wax or plastic residue?

Nope. Only wood.