Tree-trimming trucks, like the one seen near Barstow, Ill., in this file photo, frequently park in the Mississippi Valley Fairgrounds lot overnight.

Q: I’ve noticed in the past couple of weeks, there are several tree-trimming trucks parked in the lot on the east side of the Mississippi Valley Fairgrounds in Davenport at night, but they’re gone during the day. Are they there for seasonal work or is it an out-of-town company?

— Kevin, Davenport

A: We checked with Bob Fox, general manager of the Mississippi Valley Fair, who said the trucks belong to Asplundh Tree Expert Co., which trims trees all over the Quad-Cities under a contract.

“I let them park in the lot overnight to make it more of a central parking location for them when they work around this area,” Fox said.

MidAmerican Energy spokesman Tim Grabinski confirmed that the Asplundh crews are working on contract for the utility company. He said the utility contracts for trees to be trimmed around utility lines in its service area, with the crews making rounds in neighborhoods on a three-year cycle. He said they use the fairgrounds lot as a staging area while working in the Quad-Cities. The trimming is done to improve reliability of the electrical distribution system, he said.

Q: I’m an early morning walker and go out between 5 a.m. and 6:30 a.m. I can take a sweatshirt right out of the dryer, go for my walk, and when I get back, the sweatshirt absolutely reeks. I wonder if that’s an air-quality control problem or why there’s such an odor in that sweatshirt after only being outside an hour and a half. I live in the Coal Valley area near the Quad-City Airport.

— Dan, Coal Valley

A: Well, Dan, we haven’t heard of any widespread air pollution problems that would cause that situation. However, we did find references on several athletic and clothing websites that mention the problem of bacteria hibernating in clothing, even freshly washed apparel, then quickly stinking up the place when you start sweating.

The solutions appear to be to wash the item in hot water if it can handle the temperature, or use a cup of vinegar in the wash and rinse cycle for fresh-smelling clothing. Another suggestion is to add a few tablespoons of baking soda to the wash cycle.

You didn’t say whether this happens with one particular sweatshirt or all of them. Some fabrics absorb odors more than others. Good luck!

Follow-up file

More on the Davenport A&W’s Coney Island hotdog sauce: From Tim Sullivan, a member of the Stupka family, who says his aunt created the recipe and he used to be associated with the restaurants. Various family members still have the recipe, and he occasionally makes a family-sized batch of the good stuff. If the family ever agrees to share the recipe or market it, he’ll let us know.

(Answers compiled by Times community editor Linda Watson.)