Our sink has been on the "slow" side when draining lately.
I did "boil out" the trap with baking soda and vinegar, but the drain hose from sink to gray H2O tank may need to be cleaned. I thought it would be easier to simply replace the hose and a lot neater job as well.
We use a lot of organic coconut oil in cooking and do use loads of dish detergent and pour very hot water down the drain regularly.
It appears to be 1" OD clear flexible tubing and ~ 3' long. Only two standard hose clamps on each end and both readily accessible.
An Amazon search for tubing has not turned up anything with that diameter all smaller or larger. Camco lists one as an RV drain, however this is ribbed and not smooth and appears to be 1.25" dia.
Guess I can call Scamp
Tuesday and see what they suggest or if they can send me a replacement.