Advantage Flea Spot-On works by using the active ingredient imidacloprid to kill fleas on contact. When applied to the skin, the solution spreads across the pet's body, targeting and eliminating fleas within 12 hours of application. It also provides ongoing protection by killing any new fleas that come into contact with the pet for up to 30 days. This spot-on treatment is effective at breaking the flea life cycle and preventing reinfestation. **

The flower shop may or may not be open on Father's Day, as it depends on the specific shop and its operating hours. It is best to check with the flower shop directly or visit their website to see if they are open on Father's Day. Some flower shops may have special hours or promotions for Father's Day, so it's a good idea to plan ahead and confirm their availability. **

To repair a light spot on a Kindle, you can try a few different methods. First, you can try gently tapping or massaging the area around the light spot to see if it will even out. If that doesn't work, you can try using a soft cloth to gently clean the screen, as sometimes dirt or debris can cause uneven lighting. If the light spot persists, you may need to contact Kindle customer support for further assistance or consider getting the device repaired or replaced. **

I'm sorry, but I cannot provide real-time information about the operating hours of specific businesses. I recommend checking the Döner kebab shop's website or contacting them directly for their Ascension Day opening hours. **

Frontline Spot On is a topical flea and tick treatment for dogs and cats. It is applied directly to the skin on the back of the neck and provides long-lasting protection against fleas, ticks, and lice. Frontline Spot On works by killing parasites on contact, preventing infestations and protecting pets from the diseases these parasites can transmit. It is a popular choice among pet owners for its effectiveness and ease of use. **

As an AI, I do not have the ability to physically see or perceive light spots or any visual stimuli. My responses are generated based on the information provided to me and programmed knowledge. If you have seen a light spot and have concerns about it, it may be best to consult with a medical professional or eye specialist for further evaluation. **

To stain a light sanded spot on a parquet floor darker, you can try sanding the spot again to remove any remaining finish or stain. Once the spot is sanded, you can apply a darker stain to achieve the desired color. Make sure to follow the manufacturer's instructions for the stain and allow it to dry completely before applying a finish. If the stain still doesn't work, you may need to consult a professional to assess the condition of the floor and determine the best course of action. **

In Frankfurt, you can shop at night in the city center, particularly along Zeil Street which is a popular shopping area with many stores open late. On Sundays, you can visit the Zeil Galerie shopping mall which is open from 1 pm to 6 pm. Additionally, the Hauptwache train station area also has shops and restaurants that are open on Sundays for shopping and dining. **