I'm pretty sure that even almost invisible smoke can already cause significant trouble in this respect. Partly because particles of smoke themselves can be elec

I'm pretty sure that even almost invisible smoke can already cause significant trouble in this respect. Partly because particles of smoke themselves can be electrostatically attracted to objects under significant voltage, so even low density smoke can concentrate itself in problematic places. See Figure 3. and the text above it in https://www.osti.gov/servlets/purl/3313 https://www.osti.gov/servlets/purl/3313 .