Serve safely from the trolley
If your airline continues an albeit limited trolley service in CoVid19 times, it is important that your staff don't become super spreaders. They should of course wear masks and gloves. But the gloves should also be cleanable so they can be treated with hand sanitizer between each customer. This hinders immediate transfers of viruses from the card/cash of one customer to the items of the next. Remember that virus stays alive for minutes on skin, hours on clothes but days on hard surfaces. In general, if you are doing to much with your hands to clean them constantly, just wear gloves and clean them. The same goes for they who are allergic to cleaning stuff or get sores from washing their hands to often.