According to Mori V'Rabi

 

Some of the Halachos heard on the phone 3 years ago
during Covid 19 from מורי ורבי הרה"ג ר' שלמה מילר שליט"א  
at his במקום שבת הגדול דרשה
Some Halachos might be הלכה ולא למעשה.
being it was said during Covid

Reb Shlomo Miller 

1) One should not order Chametz before Pesach from
Amazon etc. to be delivered after Pesach.

2)  Garbage bins belonging to the municipality may be filled
with Chametz if put out on the curb before Pesach.

3) Burning Chametz requires a one-piece כזית or combined
smaller pieces totaling a  כזית but then it needs to be in one כלי. 

4) When buying from a store a  כלי that needs טבילה it's
best to sell it to a Goy.

Not having in mind to be קונה the כלי when purchasing it is
not an option. (Mikvaos were closed)

5) One can do ביעור חמץ by placing a כזית חמץ on a fork and
burning it over a candle.

6) According to some, you can't Kasher a quartz countertop.
Some consider crushed stone as חרס.

7) The Torah specified only כלי חרס can't be Kashered.
Anything else could be Kashered. Therefore some hold
one may Kasher even plastic etc.

8) Most alcohols in hand sanitizers are not made from
grain and one can rely on רוב that it's not חמץ.
        

9) Those who Daven מוסף ביחידות on the first day of

Pesach should stop saying משיב הרוח ומוריד הגשם at 
מוסף (not at Mincha) (Even Nusach Ashkenaz in Chutz Laaretz) 

However, If you did say משיב הרוח at מוסף there is no
need to repeat the מוסף.