No, you shouldn't. Like the others, Grundig vacuum cleaners' dust bags should be used only once because they are made of a porous material. These pores will be clogged with dust and dirt even if you empty the dust bag. Using dust bags more than once may damage your vacuum cleaner in the long run. It may also lead to a drop in your appliance’s performance.

Regular vacuum cleaners are not designed to pick up water and other liquids. You can only use water-filtered vacuum cleaners or vacuums with carpet cleaning functions to suck up liquids. Other models may get damaged if you try to vacuum over wet surfaces.

Vacuum cleaners are designed to pick up ordinary household dust and dirt. Big, hard, and pointy items may clog or damage your appliance. That’s why you should not vacuum things like construction debris, cement dust, pins, and hair clips. Unless you own a water-filtered vacuum cleaner or one that has a carpet cleaning function, you should not use vacuum wet spills either.

Although indoor vacuum cleaners are not designed to be used outside, you can use them as long as you don’t pick up hard items and do not overfill the dust bag or container.

Every Grundig vacuum cleaner has a unique serial number. The location of the factory sticker changes depending on the model of your appliance. Robot, canister, and barrel vacuum cleaners' serial numbers are located under the appliance. Upright and cordless vacuums have their serial number stickers at the back or on the handle of the appliance.