You can do this easily with a towel tissues or for windows that open a squeegee. When you re done use a dry cloth to remove any moisture and throw both cloths away.
A thorough answer follows keep reading.
How to get rid of mould caused by condensation. Similarly household bleach can be used to kill mould on walls. Condensation will be visible on windows but not usually on walls until the problem is bad or has caused the growth of black mould. In the short term make sure you regularly clear your windows of condensation so it doesn t cause damage or develop into mould.
Mix bleach into a bucket of warm water before using a damp cloth to scrub the surface until it has gone. Check for other sources of moisture. It advises to be careful not to brush the mould as this can release mould spores.
The cause of the condensation is most likely the warm air from the kitchen or shower. Nowadays there are some non toxic mould removal products on the market which can effectively eliminate mould. Leave to dry overnight and then spray the affected area with an anti fungal wash and allow that to dry.
This removes the water necessary for growth and as a convenient side benefit also removes the dust particles or other food source that they could feed on. A final approach to preventing or at least minimizing mold growth on window surfaces is to just wipe it off each morning when the night temperature was cool enough to cause condensation. An effective two stage method is to start by cleaning off the mould with spray containing bleach.
This will help remove the staining that persistent mould can leave behind. Modern living insulation condensation and mould in times gone by houses would have had single glazing air vents built into the brickwork and open fireplaces that would have literally drawn any stale air outside. Proper ventilation will reduce moisture so you can get rid of the mold.
If you re removing mould caused by condensation the nhs recommends that you wipe it away with a cloth dipped in soapy water.