First, prevent accumulation of more bags. Is there something that would remind you to take them? Eg if you use a car to go to the shops, put them in the car. Or if you normally carry a bag or backpack, put some in there. After that, if you have more than you can use, and they are in good condition, you could give them to a food pantry. Or, if not, reuse as rubbish bags. Unfortunately there is no soft plastics recycling anymore.