Probably the cotton ones. You can wash those in the washing machine, and just iron them normally.
Additional answer
Window blinds such as external roller blinds can be considered as one type of window covering that can be easily cleaned. You can clean it with a soap and towel even while installed or have it generally cleaned every 3-4 months. It lasts longer to compared to other types of window coverings.
Most people consider aluminum blinds the easiest to clean.
You can clean them with a feather duster or get a damp rag and wipe them clean if a feather duster doesn't get it all.
To create a DIY privacy window for your home, you can use frosted window film, adhesive window coverings, or decorative window film. Measure the window dimensions, clean the glass surface, and apply the chosen material following the manufacturer's instructions. This will provide privacy while still allowing natural light to enter your home.
LG computer monitors are easiest to clean
Easiest to clean is glass and steel.
you clean it
clean me
You get a bucket of water wet the squeegee and clean the window
Silicone based nipples, as opposed to latex nipples are easiest to clean and will not hold a bad smell.
you get windex and clean them
Roman shades are easiest because they can be washed in the machine.
Semi-gloss paint is the easiest to clean for walls and surfaces due to its smooth finish and durability.