Small Snail On My Garage Door

Stupid useless biology degree.
Small snail on my garage door. The white garage door is covered in tiny snails. We had this problem since mid summer but it seems to be getting worse now. Needless to say i d like to prevent this. Since a few weeks i got a small slug infestation.
During the night about 20 different slugs traverse on my glass doors and are all gone when morning comes. To keep the rain off the bait i pour a small amount in a plastic cup turn the cup on its side and let the snails have a party. They are in the grass the soil our driveway on the garage door on the front steps the walkway everywhere. Since i have a large glass sliding door at the back of my house which the snails seem to like it gets covered in slugtrails and slugexcriments.
Water your garden in the late afternoon. We have no idea why they are there or what they like about it or even where they come from. Remove such items or store them away from garden areas when possible. Snails are drawn to areas that remain cool and damp such as under boards and planters or in water meter boxes.
They are very small and you can see them with their tiny little shells. Picking snails from your garden one by one and dropping them into a bucket of soapy water or a plastic bag is an effective way to deal with the slimy pests. I empty it when it s full of the little devils. I use snail bait in areas where snails and slugs are a problem.