Harmattan is car wash season: how to prepare for the dust

Ask any owner in Tamale or Kumasi which months pay the rent and the answer is the same: December, January, February. When the Harmattan wind comes down from the Sahara, every car in Ghana turns the same shade of beige within a day of being washed, and drivers who used to come once a fortnight start coming every week. A car wash in Harmattan can do half as many cars again as it did in October, sometimes more.

The owners who make the most of it are the ones who prepared in October. The ones who did not spend December running out of water on Saturdays, drying cars with gritty towels that scratch, and turning away the interior jobs that pay best because the vacuum is clogged. This post is the October list.

Why a car wash in Harmattan sells more interiors

A car parked overnight in Ashaiman or Nyohini in January needs a wash before the owner can see out of the rear window. But the mix of work changes as well as the volume. Customers who only ever bought a body wash start asking for interiors, because the dust is inside the car too: on the dashboard, in the vents, in the seat fabric.

Engine bays fill with fine dust. Air filters clog faster. Each of these is a service you can sell at a higher price than a body wash, if your crew knows how to do it and your equipment is ready. Christmas sits in the middle of it all, with funerals, church programmes and travel to the hometown, and is a separate peak inside the season.

Water: store more than you think you need

The dry season is exactly when water gets scarce and expensive. GWCL pressure drops in many areas, boreholes in the north can slow, and tanker prices rise with demand, at the same moment your car count is going up. A single 2,500-litre Poly tank is often empty by 2pm on a December Saturday.

Before the season, add storage. A second or third tank is often the cheapest improvement a wash can make, and the planning side of it is in water supply for car washes in Ghana. Agree a standing tanker delivery with a driver you trust rather than calling around on the day every other wash is calling too.

Cut water per car without cutting quality. A pressure washer uses far less than an open hose, and a foam pre-wash loosens dust so the rinse is shorter. Teach washers to shut the trigger between panels; a hose running on the ground is water you paid a tanker for.

Towels, mitts and the scratch problem

Harmattan dust is abrasive. A towel that picked up grit from the last car will drag it across the next one's paint, and this is the season when a customer who paid GH₵60 for a full wash comes back on Monday to show you swirl marks on his black bonnet.

Double your towel stock before the season, and set a rule that a towel which touches the ground is out of use until it is washed. Wash microfibre separately from cotton and without fabric softener, which clogs the fibres. Rinse wash mitts in a second bucket after every panel, which is the two-bucket method and the single most useful habit for avoiding scratches in dust season.

Interiors and air filters: the Harmattan upsell

The interior is where the Harmattan money is. A quick interior refresh, meaning vacuum, dashboard wipe, vents brushed, windows inside, might sell for GH₵20 to GH₵40 on top of a body wash in Accra in 2026, varying widely by area and by what you include. A full interior with seats shampooed sells for considerably more.

Prepare the vacuum. Clean or replace the filter weekly in dust season, and keep a spare. A vacuum that has lost suction makes interiors slow, and the washer doing them will quietly stop offering the service.

Offer a cabin air filter check and replacement where you have a washer who can do it on common models. Filters are cheap from the spare parts dealers at Abossey Okai or Suame and the job takes minutes on many cars. Do not sell what you cannot do well; a washer who breaks a glove box clip costs more than the filter earned. The service side is covered in adding detailing services to your car wash.

Prices and staffing for a four-month peak

Some washes raise prices for the season; most do not, because customers remember. A better approach is to hold the body wash price and make money on the interior and engine services that dust creates demand for. If you do raise prices, do it clearly on the board in November and leave it there, rather than quoting higher on a busy day.

Staffing is where Harmattan catches owners out. Christmas week needs more hands than any other week of the year, and it is also when washers travel to their hometowns. Agree in October who is working the last two weeks of December, and what the Christmas bonus is for those who stay. Keep a bench of two or three casual washers who have done a trial day with you; there is more in hiring car washers in Ghana who stay. Open earlier too: Harmattan mornings are cool, and a 6:30 start in December catches commuters on the way to work.

Protecting the wash itself from the dust

Dust gets into pressure washer air intakes, vacuum motors and the MoMo phone's charging port. Cover the machines at night. Blow out the generator's air filter weekly if you run one. Keep chemical drums sealed. Wet the forecourt before the first cars, so the dust you kick up does not resettle on cars you have just dried.

The list for this week: count the towels, check the tank, call the tanker driver, clean the vacuum filter, and ask the washers who is staying for Christmas.