You also need appropriate language in your lease or house rules to authorize (and reference) these fees.Examples could include- auger toilet; rekey locks (per cylinder); painting (per room, or SF): cleaning appliance; stripping/waxing per room; carpet shampoo per room; light cleaning; heavy cleaning; trash removal per pickup load...You also need an adequate disclaimer for NON-routine situations- perhaps an hourly charge, or emergency after hours rates, etc.

Do you permit tenants' use of candles of attempt to regulate their use?

I make sure to have lots of foil, wax paper, plastic wrap, ziplock bags, to-go coffee cups, storage containers, etc.  

Moreover, if the house smells of too many synthetic fragrances, like candles, air fresheners, or sprays, it may be to cover up problematic odors.Check for leaks under the sinks, basement, windows, and other areas if you notice a moldy odor.

I shouldn't have deleted the front door photo and the dining room.. there were more red splatter there, plus burnt candles.  

What about a wax? 

Did you ever try those wax ear plugs, they work very well.

Clotheslines, hammocks, outdoor showers, outdoor seating/eating spaces, and bug repelling torches/candles (preferably torches so they can't be moved to areas where they become fire hazards) are all good options for outdoor amenities.

No open flames/candles of any kind2.

I would consider them for things like toilet replacement or a new wax ring just consider liability.