Good question! From the usual suspects like hair and quilted toilet paper, to bath oil beads, and even cat litter, the possible items that may be clogging your drain vary and are numerous.
How To Prevent Clogs
Preventing a clog is always better than fixing a drain that is already clogged. Being proactive and responsible for maintenance is the first step in preventing clogs from ever occurring. First is just paying attention to what you flush, what products you use in the shower/bath, and what you put in your garbage disposal.
By implementing some preventative measures you will save some headaches. A simple mesh filter, which is inexpensive and can be bought at any hardware store, is a huge line of defense against hair running from your shower/bath into your drains and causing a clog. By installing a mesh filter, you can easily prevent hair from going down bathroom sinks or shower drains. Hair isn’t the only drain-clogging culprit. Beauty products like bath oil beads, due to their gelatin exterior can solidify and clump up in drains.
Along with putting filters in bathroom sinks and shower/baths you should also place one over your washing machine discharge hose that leads into your laundry tub. Kitchen drains often join with laundry drains. That means grease from the kitchen sink can combine with lint from the washing machine. In minutes, by attaching a filter to your laundry hose you avoid running into this problem.
Another preventative tip is to regularly treat your pipes with products that contain bacteria that condition your pipes. You should do this based on product instructions. Most of these products are environmentally friendly and will help keep your drains clog-free. They’re also easy on your pipes and as a result can be used more often for regular maintenance.