Stink Bugs Indoors: How to Prevent and Remove Them Effectively

Stink bugs have become frequent visitors to Slovenian homes, particularly in autumn when they seek shelter from the cold. They are not dangerous to people, but they can be very unpleasant because of the characteristic odour they release when threatened.

7/8/2026

What Are Stink Bugs?

Stink bugs, also known as shield bugs, are insects from the family Pentatomidae. One of the most widespread pest species in Slovenia is the brown marmorated stink bug (Halyomorpha halys), an invasive species originating from East Asia. Its exceptional adaptability has allowed it to spread rapidly across Europe and North America.

In addition to damaging fruit, vegetables and other cultivated plants, it is known for entering buildings in large numbers to overwinter.

Why Do Stink Bugs Enter Homes?

During spring and summer, stink bugs remain outdoors and feed on plants. As temperatures fall in autumn, they begin searching for warm, dry places in which to overwinter.

They most commonly enter houses and apartments through:

  • gaps around windows and doors,
  • poorly sealed openings in façades,
  • ventilation openings and air vents,
  • service-entry points,
  • damaged insect screens.

They are attracted to sunny, warm surfaces and are often seen on exterior walls before finding a route indoors.

Are Stink Bugs Dangerous?

Stink bugs are not dangerous to people. They do not sting, bite or transmit known human diseases. They can nevertheless be highly irritating, particularly when they appear indoors in large numbers.

Their main defence is the release of a strongly scented liquid when stressed or physically disturbed. For this reason, they should not be crushed or squeezed.

How to Prevent Stink Bugs from Entering the Home

Prevention is the most effective form of protection.

  1. Seal openings: Inspect door and window frames, façade joints and other potential entry points. Seal cracks and gaps with silicone or another suitable material.
  2. Install insect screens: Screens on windows, doors and ventilation openings effectively prevent stink bugs and other insects from entering.
  3. Limit exterior lighting: Stink bugs may be attracted to light. Reduce unnecessary outdoor lighting in the evening or use lamps that are less attractive to insects.
  4. Inspect the building exterior regularly: During autumn, check window ledges, façades, shutters and other sunny surfaces where stink bugs gather before entering the building.

How to Remove Stink Bugs from an Apartment

If stink bugs enter despite preventive measures, several removal methods are available.

  • Vacuuming: A vacuum cleaner is one of the most effective mechanical methods. Remove the bag or empty the container as soon as possible afterwards, as defensive secretions may leave an unpleasant odour.
  • Soapy Water: Stink bugs can be placed in a container of water with a few drops of washing-up liquid. This helps contain the odour and provides a simple removal method.
  • Mechanical Removal: Individual bugs can be carefully captured with a glass, plastic bag or paper towel and removed from the room. Avoid squeezing them.

Do Natural Remedies Help?

Natural remedies may serve as a supplementary measure, but they are generally not sufficiently effective against large numbers of stink bugs.

Peppermint, lavender and tea-tree essential oils are often mentioned because their strong scent may have a repellent effect. A few drops may be mixed with water and applied around window frames, doors and other possible entry points. Garlic and white vinegar are also sometimes used for a similar purpose.


What Should You Do During a Larger Invasion?

If a building contains a large number of stink bugs and ordinary measures are not sufficient, professional pest-control support is recommended.

A specialist can assess the extent of the problem, identify the principal entry routes and recommend suitable measures for reducing the infestation.


Stink bugs most commonly enter homes in autumn while looking for overwintering sites. They hide in cracks, attics, behind cupboards, around window frames and in other quiet, protected areas. For effective control, combine rapid knock-down with longer-term protection.

Step 1: Rapid Control

For the rapid control of individual stink bugs indoors, use Effect Universal Insecticide for Stink Bugs or Effect Universal Insecticide Aerosol.

  • Fast action against stink bugs.
  • Effective against brown marmorated and green stink bugs.
  • Pleasant, refreshing fragrance.
  • Ready to use

The ready-to-use aerosol provides immediate contact action without any preparation. Spray directly onto the insects or onto areas where they frequently remain, such as window ledges, window frames, attics, garages and other locations where activity has been observed.

Effect proti smrdljivcem

Step 2: Long-Term Protection

For longer-lasting protection, use Effect Ultimum PRO.

  • Extremely fast initial action.
  • Powerful knock-down effect.
  • Effective reduction of insect populations.
  • Broad spectrum of action.
  • Suitable for more demanding infestations.
  • Extended residual protection

After dilution with water, the concentrated insecticide can be used to treat larger surfaces and provides rapid contact action with extended residual performance. Focus on entry and resting areas, including window and door frames, attics, cracks, crevices and other potential access points.

Effect Ultimum PRO

Additional Preventive Measures

In addition to insecticide treatment:

  • seal cracks and gaps around windows and doors,
  • install or repair insect screens,
  • close openings through which stink bugs can enter,
  • remove individual bugs before they hide inside the building.

Timely action before the main autumn invasion can significantly reduce the number of stink bugs overwintering in your home.

Effect Universal Insecticide Aerosol for Stink Bugs – ready-to-use aerosol for rapid and effective control of individual stink bugs indoors.

Effect Universal Insecticide Aerosol – ready-to-use aerosol for rapid control of insects indoors, with a pleasant fragrance.

Effect Ultimum PRO – concentrated insecticide for extended protection of treated surfaces and control of stink bugs at their entry and resting points.



Use biocides safely. Always read the label and product information before use.